Employee Benefit Plans Defined Benefit Plan Change in Benefit Obligations and Plan Assets Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	$ (43,730)	$ (38,230)
Service costs	(890)	(760)	$ (680)
Interest costs	(1,580)	(1,760)	(1,610)
Participant contributions	60	60
Actuarial gain (loss)	(150)	(6,470)
Benefit payments	(1,640)	(2,230)
Settlement payments	5,210	0
Change in foreign currency	1,320	1,320
Defined Benefit Plan, Benefit Obligation	(38,240)	(43,730)	(38,230)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets	32,610	31,780
Actual return on plan assets	50	1,830
Employer contributions	3,640	2,340
Participant contributions	60	60
Benefit payments	(1,640)	(2,230)
Settlement payments	(5,210)	0
Change in foreign currency	(1,240)	(1,170)
Fair value of plan assets	28,270	32,610	31,780
Defined Benefit Plan, Funded Status of Plan [Abstract]
Funded Status at December 31	(9,970)	(11,120)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	(660)	(810)
Service costs	0	0	0
Interest costs	(20)	(30)	(40)
Participant contributions	0	0
Actuarial gain (loss)	200	100
Benefit payments	(70)	(80)
Settlement payments	0	0
Change in foreign currency	0	0
Defined Benefit Plan, Benefit Obligation	(410)	(660)	(810)
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	70	80
Participant contributions	0	0
Benefit payments	(70)	(80)
Settlement payments	0	0
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	$ (410)	$ (660)