Acquisitions (Details) - USD ($)	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Business Acquisition [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 57,681,000		$ 63,021,000	$ 69,455,000
Accounts Receivable, Net, Current	132,098,000		127,806,000
Inventory, Net	158,313,000		152,886,000
Prepaid Expense, Current	17,020,000		16,582,000
Assets, Current	365,112,000		360,295,000
Property, Plant and Equipment, Net	102,255,000		113,079,000
Goodwill	329,062,000		347,434,000
Intangible Assets, Net (Excluding Goodwill)	244,928,000		263,764,000
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	33,093,000		32,442,000
Assets	1,104,003,000		1,142,446,000
Accounts Payable, Trade, Current	41,380,000		46,970,000
Accrued Liabilities, Current	95,607,000		99,963,000
Liabilities, Current	197,026,000		206,997,000
Other Liabilities, Noncurrent	203,422,000		223,966,000
Liabilities	679,718,000		734,217,000
Common Stock, Value, Issued	233,000		230,000
Additional Paid in Capital, Common Stock	275,594,000		269,360,000
Retained Earnings (Accumulated Deficit)	221,239,000	$ 206,491,000	197,897,000	$ 202,989,000	$ 191,391,000	$ 179,735,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	424,285,000		408,229,000
Liabilities and Equity	1,104,003,000		$ 1,142,446,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Cash and Cash Equivalents, at Carrying Value	522,000
Accounts Receivable, Net, Current	3,880,000
Inventory, Net	11,875,000
Prepaid Expense, Current	544,000
Assets, Current	16,821,000
Property, Plant and Equipment, Net	14,925,000
Goodwill	7,392,000
Intangible Assets, Net (Excluding Goodwill)	1,902,000
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	211,000
Assets	41,251,000
Accounts Payable, Trade, Current	1,541,000
Accrued Liabilities, Current	2,341,000
Liabilities, Current	3,882,000
Other Liabilities, Noncurrent	1,843,000
Liabilities	5,725,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	35,526,000
Liabilities and Equity	$ 41,251,000