Employer Sponsored Benefit Plans - Plan Assets and Benefit Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation:
Service Cost	$ 136	$ 46	$ 0
Interest cost	2,886	2,595	2,058
Change in plan assets:
Fair value of plan assets at beginning of year	87,452
Fair value of plan assets at end of year	43,938	87,452
Balance sheet amounts:
Noncurrent liabilities	(18,957)	(22,795)
United States
Change in benefit obligation:
Net benefit obligation at beginning of year	102,679	51,882
Benefit obligation assumed through acquisition	0	52,392
Service Cost	136	46
Interest cost	2,132	2,595
Actuarial loss/(gain)	5,149	(876)
Gross benefits paid	(2,932)	(3,360)
Net effect of remeasurement	(3,290)	0
Settlement	(48,773)	0
Net benefit obligation at end of year	55,101	102,679	51,882
Change in plan assets:
Fair value of plan assets at beginning of year	87,452	44,174
Fair value of plan assets through acquisition	0	43,230
Actual return/(loss) on plan assets	6,987	(4,092)
Contributions	1,415	7,500
Gross benefits paid	(2,932)	(3,360)
Net effect of remeasurement	(211)	0
Settlement	(48,773)	0
Fair value of plan assets at end of year	43,938	87,452	$ 44,174
Net benefit obligation in excess of plan assets	(11,163)	(15,227)
Balance sheet amounts:
Current liabilities	(787)	(3,078)
Noncurrent liabilities	(10,376)	(12,149)
Total liabilities	(11,163)	(15,227)
Amounts recognized in accumulated other comprehensive income, net of tax consist of:
Net actuarial loss	2,579	21,850
Net amount recognized	$ 2,579	$ 21,850