| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
The following tables set forth the components of the Company’s accumulated other comprehensive income (loss) at: | | | | | | | | Puget Energy | December 31, | (Dollars in Thousands) | 2014 | 2013 | Net unrealized loss on energy derivative instruments | $ | (333 | ) | $ | (705 | ) | Net unrealized loss on interest rate swaps | — |
| (94 | ) | Net unrealized loss and prior service cost on pension plans | (36,710 | ) | 48,514 |
| Total Puget Energy, net of tax | $ | (37,043 | ) | $ | 47,715 |
|
| | | | | | | | Puget Sound Energy | December 31, | (Dollars in Thousands) | 2014 | 2013 | Net unrealized loss on energy derivative instruments | $ | (686 | ) | $ | (2,027 | ) | Net unrealized loss on treasury interest rate swaps | (5,990 | ) | (6,307 | ) | Net unrealized loss and prior service cost on pension plans | (164,281 | ) | (87,405 | ) | Total PSE, net of tax | $ | (170,957 | ) | $ | (95,739 | ) |
The following tables present the changes in the Company’s accumulated other comprehensive income (loss) (AOCI) by component for the years ended December 31, 2014, 2013 and 2012, respectively. | | | | | | | | | | | | | | Puget Energy | Net unrealized gain (loss) and prior service cost on pension plans | Net unrealized gain (loss) on energy derivative instruments | Net unrealized gain (loss) on interest rate swaps | | Changes in AOCI, net of tax | | (Dollars in Thousands) | Total | Balance at December 31, 2011 | $ | (15,195 | ) | $ | (1,113 | ) | $ | (14,599 | ) | $ | (30,907 | ) | Other comprehensive income (loss) before reclassifications | (13,574 | ) | — |
| — |
| (13,574 | ) | Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (296 | ) | 371 |
| 11,577 |
| 11,652 |
| Net current-period other comprehensive income (loss) | (13,870 | ) | 371 |
| 11,577 |
| (1,922 | ) | Balance at December 31, 2012 | $ | (29,065 | ) | $ | (742 | ) | $ | (3,022 | ) | $ | (32,829 | ) | Other comprehensive income (loss) before reclassifications | 76,004 |
| — |
| — |
| 76,004 |
| Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 1,575 |
| 37 |
| 2,928 |
| 4,540 |
| Net current-period other comprehensive income (loss) | 77,579 |
| 37 |
| 2,928 |
| 80,544 |
| Balance at December 31, 2013 | $ | 48,514 |
| $ | (705 | ) | $ | (94 | ) | $ | 47,715 |
| Other comprehensive income (loss) before reclassifications | (84,301 | ) | — |
| — |
| (84,301 | ) | Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (923 | ) | 372 |
| 94 |
| (457 | ) | Net current-period other comprehensive income (loss) | (85,224 | ) | 372 |
| 94 |
| (84,758 | ) | Balance at December 31, 2014 | $ | (36,710 | ) | $ | (333 | ) | $ | — |
| $ | (37,043 | ) |
| | | | | | | | | | | | | | Puget Sound Energy | Net unrealized gain (loss) and prior service cost on pension plans | Net unrealized gain (loss) on energy derivative instruments | Net unrealized gain (loss) on treasury interest rate swaps | | Changes in AOCI, net of tax | | (Dollars in Thousands) | Total | Balance at December 31, 2011 | $ | (168,704 | ) | $ | (12,934 | ) | $ | (6,941 | ) | $ | (188,579 | ) | Other comprehensive income (loss) before reclassifications | (17,049 | ) | — |
| — |
| (17,049 | ) | Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 9,755 |
| 8,358 |
| 317 |
| 18,430 |
| Net current-period other comprehensive income (loss) | (7,294 | ) | 8,358 |
| 317 |
| 1,381 |
| Balance at December 31, 2012 | $ | (175,998 | ) | $ | (4,576 | ) | $ | (6,624 | ) | $ | (187,198 | ) | Other comprehensive income (loss) before reclassifications | 74,969 |
| — |
| — |
| 74,969 |
| Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 13,624 |
| 2,549 |
| 317 |
| 16,490 |
| Net current-period other comprehensive income (loss) | 88,593 |
| 2,549 |
| 317 |
| 91,459 |
| Balance at December 31, 2013 | $ | (87,405 | ) | $ | (2,027 | ) | $ | (6,307 | ) | $ | (95,739 | ) | Other comprehensive income (loss) before reclassifications | (84,955 | ) | — |
| — |
| (84,955 | ) | Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 8,079 |
| 1,341 |
| 317 |
| 9,737 |
| Net current-period other comprehensive income (loss) | (76,876 | ) | 1,341 |
| 317 |
| (75,218 | ) | Balance at December 31, 2014 | $ | (164,281 | ) | $ | (686 | ) | $ | (5,990 | ) | $ | (170,957 | ) |
|
| Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about these reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012, respectively, are as follows:
| | | | | | | | | | | | Puget Energy | | | | | (Dollars in Thousands) | | | | | Details about accumulated other comprehensive income (loss) components | Affected line item in the statement where net income (loss) is presented | Amount reclassified from accumulated other comprehensive income (loss) | 2014 | 2013 | 2012 | Net unrealized gain (loss) and prior service cost on pension plans: | | | | | Amortization of prior service cost | (a) | 1,938 |
| 1,997 |
| 1,980 |
| Amortization of net gain (loss) | (a) | (519 | ) | (4,420 | ) | (1,524 | ) | | Total before tax | 1,419 |
| (2,423 | ) | 456 |
| | Tax (expense) or benefit | (496 | ) | 848 |
| (160 | ) | | Net of Tax | $ | 923 |
| $ | (1,575 | ) | $ | 296 |
| Net unrealized gain (loss) on energy derivative instruments: | | | | | Commodity contracts: Electric derivatives | Electric generation fuel | — |
| — |
| 100 |
| | Purchased electricity | (572 | ) | (57 | ) | (671 | ) | | Total before tax | (572 | ) | (57 | ) | (571 | ) | | Tax (expense) or benefit | 200 |
| 20 |
| 200 |
| | Net of Tax | $ | (372 | ) | $ | (37 | ) | $ | (371 | ) | Net unrealized gain (loss) on interest rate swaps: | | | | | Interest rate contracts | Interest expense | $ | (144 | ) | $ | (4,505 | ) | $ | (17,811 | ) | | Tax (expense) or benefit | 50 |
| 1,577 |
| 6,234 |
| | Net of Tax | $ | (94 | ) | $ | (2,928 | ) | $ | (11,577 | ) | Total reclassification for the period | Net of Tax | $ | 457 |
| $ | (4,540 | ) | $ | (11,652 | ) |
__________ | | (a) | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 12 for additional details). |
| | | | | | | | | | | | Puget Sound Energy | | | | | (Dollars in Thousands) | | | | | Details about accumulated other comprehensive income (loss) components | Affected line item in the statement where net income (loss) is presented | Amount reclassified from accumulated other comprehensive income (loss) | 2014 | 2013 | 2012 | Net unrealized gain (loss) and prior service cost on pension plans: | | | | | Amortization of prior service cost | (a) | $ | 1,526 |
| $ | 1,559 |
| $ | 1,245 |
| Amortization of net gain (loss) | (a) | (13,954 | ) | (22,519 | ) | (16,203 | ) | Amortization of transition obligation | (a) | — |
| — |
| (50 | ) | | Total before tax | (12,428 | ) | (20,960 | ) | (15,008 | ) | | Tax (expense) or benefit | 4,349 |
| 7,336 |
| 5,253 |
| | Net of tax | $ | (8,079 | ) | $ | (13,624 | ) | $ | (9,755 | ) | Net unrealized gain (loss) on energy derivative instruments: | | | | | Commodity contracts: Electric derivatives | Electric generation fuel | — |
| — |
| 97 |
| | Purchased electricity | (2,063 | ) | (3,922 | ) | (12,955 | ) | | Total before tax | (2,063 | ) | (3,922 | ) | (12,858 | ) | | Tax (expense) or benefit | 722 |
| 1,373 |
| 4,500 |
| | Net of Tax | $ | (1,341 | ) | $ | (2,549 | ) | $ | (8,358 | ) | Net unrealized gain (loss) on treasury interest rate swaps: | | | | | Interest rate contracts | Interest expense | (488 | ) | (488 | ) | (488 | ) | | Tax (expense) or benefit | 171 |
| 171 |
| 171 |
| | Net of Tax | $ | (317 | ) | $ | (317 | ) | $ | (317 | ) | Total reclassification for the period | Net of Tax | $ | (9,737 | ) | $ | (16,490 | ) | $ | (18,430 | ) |
__________ | | (a) | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 12 for additional details). |
|