Acquisitions (Narratives) (Details) - USD ($)		3 Months Ended								12 Months Ended
	Oct. 02, 2012	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired										$ 0	$ 0	$ (561,000)
Sales		$ 216,989,000	$ 223,772,000	$ 221,245,000	$ 234,171,000	$ 239,219,000	$ 240,429,000	$ 236,965,000	$ 235,213,000	896,177,000	951,826,000	959,346,000
Net income from continuing operations		$ (5,876,000)	$ (36,723,000)	$ 594,000	$ 9,870,000	$ 13,054,000	$ 10,745,000	$ 3,752,000	$ 8,479,000	$ (32,135,000)	$ 36,029,000	$ 35,937,000
AACOA
Business Acquisition [Line Items]
Percentage of outstanding equity interests acquired	100.00%
Total purchase price	$ 54,100,000
Cash received from seller													$ 600,000
Financing used to fund purchase price from existing credit facility	$ 350,000,000