Employee Benefit Plans Defined Benefit Plan Change in Benefit Obligations and Plan Assets Table (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	$ (39,030)	$ (37,640)
Service costs	(1,120)	(1,150)	$ (950)
Interest costs	(1,100)	(1,290)	(1,510)
Participant contributions	(60)	(60)
Actuarial gain (loss)	3,020	990
Benefit payments	1,200	1,320
Defined Benefit Plan, Benefit Obligation, Annuity Purchase	5,480	0
Settlements and curtailments	210	710
Change in foreign currency	1,100	(1,910)
Defined Benefit Plan, Benefit Obligation	(30,300)	(39,030)	(37,640)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets	31,760	26,260
Actual return on plan assets	(1,520)	2,510
Employer contributions	2,440	3,170
Participant contributions	60	60
Benefit payments	(1,200)	(1,320)
Defined Benefit Plan, Plan Assets, Annuity Purchase	5,480	0
Settlements	(210)	(710)
Change in foreign currency	(1,200)	1,790
Fair value of plan assets	24,650	31,760	$ 26,260
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Funded Status at December 31	$ (5,650)	$ (7,270)