| [PLN ‘000] | 2013 | 2014 | Change | Change % | 
|---|
| Net sales revenue | 9 150 520 | 9 855 395 | 704 875 | 7,70% | 
|---|
| Operating profit / (loss) | 905 859 | 1 186 475 | 280 616 | 31,00% | 
|---|
| Profit / (loss) before tax | 954 065 | 1 143 102 | 189 037 | 19,80% | 
|---|
| Net profit / (loss) for the reporting period | 722 520 | 909 122 | 186 602 | 25,80% | 
|---|
| EBITDA | 1 667 618 | 1 914 883 | 247 265 | 14,80% | 
|---|
| Net cash flows from: |  |  |  |  | 
|---|
| operating activities | 1 644 210 | 1 115 676 | -528 534 | -32,10% | 
|---|
| investing activities | -1 770 859 | -3 048 793 | 1 277 934 | 72,20% | 
|---|
| financing activities | 604 956 | 1 045 785 | 440 829 | 72,90% | 
|---|
| Balance of cash | 1 573 195 | 687 316 | -885 879 | -56,30% | 
|---|
| Weighted average number of shares [pcs.] | 441 442 578 | 441 442 578 | - | - | 
|---|
| Net profit per share [PLN] | 1,64 | 2,06 | 0,42 | 25,60% | 
|---|
| Diluted profit per share [PLN] | 1,64 | 2,06 | 0,42 | 25,60% | 
|---|
| [PLN ‘000] | Q4 2013 | Q4 2014 | Change | Change % | 
|---|
| Net sales revenue | 2 363 277 | 2 628 223 | 264 946 | 11,20% | 
|---|
| Operating profit / (loss) | 86 182 | 194 925 | 108 743 | 126,20% | 
|---|
| Profit / (loss) before tax | 97 702 | 123 780 | 26 078 | 26,70% | 
|---|
| Net profit / (loss) for the reporting period | 60 863 | 72 807 | 11 944 | 19,60% | 
|---|
| EBITDA | 273 519 | 399 136 | 125 617 | 45,90% | 
|---|
| Weighted average number of shares [pcs.] | 441 442 578 | 441 442 578 | - | - | 
|---|
| Net profit per share [PLN] | 0,14 | 0,16 | 0,02 | 14,30% | 
|---|
| Diluted profit per share [PLN] | 0,14 | 0,16 | 0,02 | 14,30% | 
|---|
| [PLN ‘000] | 31 December 2013 | 31 December 2014 | Change | Change % | 
|---|
| Total assets | 16 329 180 | 18 108 040 | 1 778 860 | 10,90% | 
|---|
| Total liabilities | 4 840 333 | 6 044 027 | 1 203 694 | 24,90% | 
|---|
| Non-current liabilities | 2 563 073 | 4 190 197 | 1 627 124 | 63,50% | 
|---|
| Current liabilities | 2 277 260 | 1 853 830 | (423 430) | (18,60)% | 
|---|
| Equity | 11 488 847 | 12 064 013 | 575 166 | 5,00% | 
|---|
| Share capital | 588 018 | 588 018 | - | - | 
|---|
| Book value per share [PLN] | 26,03 | 27,33 | 1,3 | 5,00% | 
|---|
| Diluted book value per share [PLN] | 26,03 | 27,33 | 1,3 | 5,00% | 
|---|
|  | unit | 2013 | 2014 | Change | Change % | 
|---|
| Net sales revenue | PLN '000 | 9 150 520 | 9 855 395 | 704 875 | 7,70% | 
|---|
| EBITDA | PLN '000 | 1 667 618 | 1 914 883 | 247 265 | 14,80% | 
|---|
| EBIT | PLN '000 | 905 859 | 1 186 475 | 280 616 | 31,00% | 
|---|
| Net profit | PLN '000 | 722 520 | 909 122 | 186 602 | 25,80% | 
|---|
| Net cash flows from operating activities | PLN '000 | 1 644 210 | 1 115 676 | -528 534 | -32,10% | 
|---|
| CAPEX | PLN '000 | 2 194 454 | 2 748 972 | 554 518 | 25,30% | 
|---|
| Net debt / EBITDA | - | -0,6 | 0,5 | 1,1 | - | 
|---|
| Return on assets (ROA) | % | 4,4 | 5 | 0,6 | - | 
|---|
| Return on equity (ROE) | % | 6,3 | 7,5 | 1,2 | - | 
|---|
| Trade |  |  |  |  |  | 
|---|
| Sales of electricity to end users | GWh | 13 216 | 16 339 | 3 123 | 23,60% | 
|---|
| Number of recipients (Power Delivery Points) | thou. | 2 368 | 2 364 | -4 | -0,20% | 
|---|
| Distribution |  |  |  |  |  | 
|---|
| Sales of distribution services to end users | GWh | 17 273 | 17 621 | 348 | 2,00% | 
|---|
| Number of customers | thou. | 2 438 | 2 461 | 23 | 0,90% | 
|---|
| Generation |  |  |  |  |  | 
|---|
| Total generation of electricity, including e.g.: | GWh | 11 854 | 12 812 | 958 | 8,10% | 
|---|
| from conventional sources | GWh | 10 890 | 11 779 | 889 | 8,20% | 
|---|
| from renewable sources of energy | GWh | 964 | 1 033 | 69 | 7,20% | 
|---|
| Heat generation | TJ | 4 922 | 4 916 | -6 | -0,10% | 
|---|
| Sales of conventional electricity | GWh | 13 619 | 15 861 | 2 242 | 16,50% | 
|---|
| Sales of electricity from RES | GWh | 964 | 1 033 | 69 | 7,20% | 
|---|
| Sales of heat | TJ | 4 519 | 4 310 | -209 | -4,60% | 
|---|
|  | unit | 4Q 2013 | 4Q 2014 | Change | Change % | 
|---|
| Net sales revenue | PLN '000 | 2 363 277 | 2 628 223 | 264 946 | 11,20% | 
|---|
| EBITDA | PLN '000 | 273 519 | 399 136 | 125 617 | 45,90% | 
|---|
| EBIT | PLN '000 | 86 182 | 194 925 | 108 743 | 126,20% | 
|---|
| Net profit | PLN '000 | 60 863 | 72 807 | 11 944 | 19,60% | 
|---|
| Net cash flows from operating activities | PLN '000 | 379 774 | 462 064 | 82 290 | 21,70% | 
|---|
| CAPEX | PLN '000 | 871 816 | 1 149 942 | 278 126 | 31,90% | 
|---|
| Net debt / EBITDA | - | -0,6 | 0,5 | 1,1 | - | 
|---|
| Return on assets (ROA) | % | 1,5 | 1,6 | 0,1 | - | 
|---|
| Return on equity (ROE) | % | 2,1 | 2,4 | 0,3 | - | 
|---|
| Trade |  |  |  |  |  | 
|---|
| Sales of electricity to end users | GWh | 3 476 | 4 365 | 889 | 25,60% | 
|---|
| Number of recipients (Power Delivery Points) | thou. | 2 368 | 2 364 | -4 | -0,20% | 
|---|
| Distribution |  |  |  |  |  | 
|---|
| Sales of distribution services to end users | GWh | 4 393 | 4 492 | 99 | 2,30% | 
|---|
| Number of customers | thou. | 2 438 | 2 461 | 23 | 0,90% | 
|---|
| Generation |  |  |  |  |  | 
|---|
| Total generation of electricity, including e.g.: | GWh | 2 866 | 3 357 | 491 | 17,10% | 
|---|
| from conventional sources | GWh | 2 569 | 3 099 | 530 | 20,60% | 
|---|
| from renewable sources of energy | GWh | 297 | 258 | -39 | -13,10% | 
|---|
| Heat generation | TJ | 1 448 | 1 911 | 463 | 32,00% | 
|---|
| Sales of conventional electricity | GWh | 3 428 | 4 104 | 676 | 19,70% | 
|---|
| Sales of electricity from RES | GWh | 297 | 258 | -39 | -13,10% | 
|---|
| Sales of heat | TJ | 1 331 | 1 567 | 236 | 17,70% | 
|---|