Annual report pursuant to Section 13 and 15(d)

Benefit Plans (Details 3)

v2.4.0.6
Benefit Plans (Details 3) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Amounts Recognized in Other Comprehensive Income (Loss) Before Tax      
Pretax, Balance, Beginning of Period $ (285,177) $ (202,292) $ (173,029)
Pretax, Balance, End of Period (363,691) (285,177) (202,292)
Amounts Recognized in Other Comprehensive Income (Loss), Tax      
Tax (expnese) Benefit, Balance, Beginning of Period 99,813 70,803 60,561
Transition Obligation      
Tax (expense) Benefit, Balance, End of Period 127,292 99,813 70,803
Amounts Recognized in Other Comprehensive Income (Loss), after Tax [Abstract]      
After-Tax, Balance, Beginning of Period (185,364) (131,489) (112,468)
Prior Service Cost      
Amortization included in net periodic benefts costs (25,788) (30,261) (34,688)
Transition Obligation      
After-Tax, Balance, End of Period (236,399) (185,364) (131,489)
Transition Obligation [Member]
      
Amounts Recognized in Other Comprehensive Income (Loss) Before Tax      
Amounts Arising During the Year   (5)  
Amoritization included in net periodic benefit costs (2)   5
Amounts Arising During the Year   (5)  
Amoritization included in net periodic benefit costs (2)   5
Transition Obligation      
Amoritization included in net periodic benefit costs 0 2 (2)
Transition Obligation      
Amortization included in net periodic benefit costs (2) (3) 3
Prior Service Cost [Member]
      
Amounts Recognized in Other Comprehensive Income (Loss) Before Tax      
Amounts Arising During the Year 0 0 0
Amoritization included in net periodic benefit costs (6,865) (6,811) (6,777)
Amounts Arising During the Year 0 0 0
Amoritization included in net periodic benefit costs (6,865) (6,811) (6,777)
Net Actuarial (loss) gain      
Amounts Arising During the Year   0  
Prior Service Cost      
Amounts Arising During the Year 0   0
Amoritization included in net periodic benefit costs 2,403 2,384 2,372
Net actuarial (loss) gain      
Amount arising during the period   0 0
Prior Service Cost      
Net prior service cost arising during the period 0    
Amortization included in net periodic benefts costs (4,462) (4,427) (4,405)
Net Actuarial (loss) gain [Member]
      
Amounts Recognized in Other Comprehensive Income (Loss) Before Tax      
Amounts Arising During the Year (105,527) (104,146) (45,804)
Amoritization included in net periodic benefit costs 33,880 28,077 23,313
Amounts Arising During the Year (105,527) (104,146) (45,804)
Amoritization included in net periodic benefit costs 33,880 28,077 23,313
Net Actuarial (loss) gain      
Amounts Arising During the Year 36,934 36,451 16,031
Amoritization included in net periodic benefit costs (11,858) (9,827) (8,159)
Net actuarial (loss) gain      
Amount arising during the period (68,593) (67,695) (29,773)
Amortization included in net periodic benefit costs $ 22,022 $ 18,250 $ 15,154