Acquisition and Divestiture (Acquisition Narrative) (Details) - USD ($)			12 Months Ended
	Feb. 20, 2014	Feb. 18, 2014	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Cash acquired	$ 7,493,000
Andrew Industries Limited
Restructuring Cost and Reserve [Line Items]
Payment to acquire business	86,900,000
Cash acquired	7,500,000
Post-closing adjustment	200,000
Purchase price borrowings	60,000,000
Amended Credit Facility
Restructuring Cost and Reserve [Line Items]
Maximum borrowing capacity increased value	$ 100,000,000	$ 100,000,000
Acquisition-related Costs
Restructuring Cost and Reserve [Line Items]
Revenues			$ 2,600,000	$ (2,600,000)
Fair Value Adjustment to Inventory
Restructuring Cost and Reserve [Line Items]
Revenues			$ 2,100,000	(2,600,000)
Interest Expense Associated with Borrowings Under the Company's Amended Credit Facility
Restructuring Cost and Reserve [Line Items]
Revenues				(900,000)
Excluded Acquisition-related Costs
Restructuring Cost and Reserve [Line Items]
Revenues				$ 1,200,000