Benefit Plans Benefit Plans (Detail 12) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	$ 825,774	$ 753,030
Foreign Currency Exchange Rate Changes, Plan Assets	17,881	20,354
Fair Value of Plan Assets, Ending	904,435	825,774
Level 3
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	99,697	116,493
Defined Benefit Plan, Actual Return on Plan Assets Still Held	1,040	1,663
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period		2,560
Defined Benefit Plan,Purchases, Total	11,919	8,799
Defined Benefit Plan Sales, Total	(13,210)	(32,219)
Foreign Currency Exchange Rate Changes, Plan Assets	2,477	2,401
Fair Value of Plan Assets, Ending	101,923	99,697
Other Types of Investments, Multi-Strategy Fund of Hedge Funds
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Ending	77,312	74,985
Other Types of Investments, Multi-Strategy Fund of Hedge Funds | Level 3
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	74,985	78,650
Defined Benefit Plan, Actual Return on Plan Assets Still Held	1,420	1,099
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period		317
Defined Benefit Plan,Purchases, Total	11,792	8,638
Defined Benefit Plan Sales, Total	(12,691)	(15,418)
Foreign Currency Exchange Rate Changes, Plan Assets	1,806	1,699
Fair Value of Plan Assets, Ending	77,312	74,985
Real Asset Mutual Funds, Commodities
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Ending	49,752	57,737
Real Asset Mutual Funds, Commodities | Level 3
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	22,986	21,816
Defined Benefit Plan, Actual Return on Plan Assets Still Held	(449)	533
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period		0
Defined Benefit Plan,Purchases, Total	0	0
Defined Benefit Plan Sales, Total	0	0
Foreign Currency Exchange Rate Changes, Plan Assets	599	637
Fair Value of Plan Assets, Ending	23,136	22,986
Fixed Income Mutual Funds, Insurance Contracts
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Ending	26,108	24,741
Fixed Income Mutual Funds, Insurance Contracts | Level 3
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	1,726	1,661
Defined Benefit Plan, Actual Return on Plan Assets Still Held	69	31
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period		3
Defined Benefit Plan,Purchases, Total	127	161
Defined Benefit Plan Sales, Total	(519)	(165)
Foreign Currency Exchange Rate Changes, Plan Assets	72	35
Fair Value of Plan Assets, Ending	1,475	1,726
Other Types of Investments, Convertible Preferred Equity Certificates | Level 3
Rollforward of Activity for Level 3 Asset Categories [Roll Forward]
Fair Value of Plan Assets, Beginning	0	14,366
Defined Benefit Plan, Actual Return on Plan Assets Still Held	0	0
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period		2,240
Defined Benefit Plan,Purchases, Total	0	0
Defined Benefit Plan Sales, Total	0	(16,636)
Foreign Currency Exchange Rate Changes, Plan Assets	0	30
Fair Value of Plan Assets, Ending	$ 0	$ 0