Acquisition Acquisitions - DSC (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 08, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition
Goodwill		$ 695,044	$ 550,202	$ 359,688
Payments to Acquire Businesses, Net of Cash Acquired		277,369	380,694	20,000
Deferred acquisition payments, net		19,848	0	0
Contingent consideration obligation		686	$ 0	$ 0
DSC Acquisition
Business Acquisition
Business Acquisition, Date of Acquisition Agreement	Mar. 08, 2019
Business Acquisition Transaction Costs		2,100
Trade accounts and notes receivable, net	$ 1,840	1,840
Inventories, net	5,523	4,307
Other current assets	1,389	1,437
Property, plant and equipment, net	16,791	16,654
Identifiable intangible assets	7,976	6,870
Right-of-use assets	79	79
Deferred tax asset	1,104	1,066
Other noncurrent assets	0	28
Accounts payables	2,461	2,861
Deferred tax liabilities	(2,861)	(1,802)
Long-term lease liability	(37)	(37)
Net Assets Acquired	29,343	27,581
Goodwill	35,133	36,540
Total Purchase Price	64,476	64,121
Payments to Acquire Businesses, Gross	49,900
Payments to Acquire Businesses, Net of Cash Acquired	49,400
Business acquisition deferred payment, gross	16,100
Interest Expense		$ 1,600
Deferred acquisition payments, net	14,000
Contingent consideration obligation	$ 700