Employee Benefit Plans Defined Benefit Plan Change in Benefit Obligations and Plan Assets Table (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	$ (34,560)	$ (29,850)
Service costs	(600)	(640)	(600)
Interest costs	(1,620)	(1,590)	(1,570)
Participant contributions	40	40
Actuarial gain (loss)	(2,900)	(4,090)
Benefit payments	(1,890)	(1,550)
Curtailment/terminations	(190)	0
Change in foreign currency	(710)	100
Defined Benefit Plan, Benefit Obligation	(38,730)	(34,560)	(29,850)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets	21,280	20,150
Actual return on plan assets	1,680	470
Employer contributions	6,130	2,290
Participant contributions	40	40
Benefit payments	(1,890)	(1,550)
Change in foreign currency	620	(120)
Fair value of plan assets	27,860	21,280	20,150
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded Status at December 31	(10,870)	(13,280)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	(1,040)	(1,100)
Service costs	0	0	0
Interest costs	(50)	(50)	(70)
Participant contributions	10	20
Actuarial gain (loss)	80	90
Benefit payments	(50)	(40)
Curtailment/terminations	0	0
Change in foreign currency	0	0
Defined Benefit Plan, Benefit Obligation	(970)	(1,040)	(1,100)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets	0	0
Actual return on plan assets	0	0
Employer contributions	40	20
Participant contributions	10	20
Benefit payments	(50)	(40)
Change in foreign currency	0	0
Fair value of plan assets	0	0	0
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded Status at December 31	$ (970)	$ (1,040)