Acquisitions (Details 3) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Apr. 06, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Business Combination, Acquired Receivables, Gross Contractual Amount		$ 43,785
Business Combination, Acquired Receivables, Estimated Uncollectible		3,718
ASSETS
Identified Intangible Assets	$ 148,744
LIABILITIES
Goodwill	183,250		$ 21,065
IPC Group
Business Acquisition [Line Items]
Revenue of Acquiree since Acquisition Date	59,074
Loss of Acquiree since Acquisition Date	(5,187)
Fair Value Step-Up Adjustment to Acquired Inventory, Net Of Tax	$ 4,470
Business Acquisition, Transaction Costs		4,684
Preliminary Fair Value of Intangible Assets		148,744
ASSETS
Restricted Cash		538
Receivables		40,067
Inventories		54,222
Other Current Assets		4,362
Assets Held for Sale		2,247
Property, Plant and Equipment		62,845
Other Assets		4,168
Total Identifiable Assets Acquired		317,193
LIABILITIES
Accounts Payable		31,529
Accrued Expenses		15,756
Deferred Income Taxes		58,573
Other Liabilities		6,967
Total Identifiable Liabilities Assumed		112,825
Net Identifiable Assets Acquired		204,368
Noncontrolling Interest		(3,312)
Goodwill		152,713
Total Estimated Purchase Price, net of Cash Acquired		353,769
Customer Lists | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
ASSETS
Identified Intangible Assets		115,571
Trade Name | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	11 years
ASSETS
Identified Intangible Assets		29,963
Noncompete Agreement | IPC Group
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
ASSETS
Identified Intangible Assets		$ 3,210