Consolidated Statements of Equity (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (loss) [Member]
Total Equity
Balance at Dec. 31, 2010   $ 2,500 $ 792,226 $ 1,902,185 $ 183,099 $ 2,880,010
Contributed capital   0 3,543 0 0 3,543
Affiliated asset transfers   0 40,252 (26,151) 0 14,101
Comprehensive income:            
Net income (132,743) 0 0 (132,743) 0 (132,743)
Other comprehensive income (loss), net of tax 30,529 0 0 0 30,529 30,529
Total comprehensive income (loss)           (102,214)
Balance at Dec. 31, 2011   2,500 836,021 1,743,291 213,628 2,795,440
Contributed capital   0 (17,718) 0 0 (17,718)
Affiliated asset transfers   0 0 0 0 0
Comprehensive income:            
Net income 684,337 0 0 684,337 0 684,337
Other comprehensive income (loss), net of tax 53,833 0 0 0 53,833 53,833
Total comprehensive income (loss)           738,170
Balance at Dec. 31, 2012   2,500 818,303 2,427,628 267,461 3,515,892
Contributed capital   0 (14,066) 0 0 (14,066)
Dividend To Parent   0 0 (423,000) 0 (423,000)
Comprehensive income:            
Net income 1,538,210 0 0 1,538,210 0 1,538,210
Other comprehensive income (loss), net of tax (210,815) 0 0 0 (210,815) (210,815)
Total comprehensive income (loss)           1,327,395
Balance at Dec. 31, 2013   $ 2,500 $ 804,237 $ 3,542,838 $ 56,646 $ 4,406,221