Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows From Operating Activities
Net income (loss)	$ 1,057	$ 17,762	$ (8,681)
Income (loss) from discontinued operations, net of income taxes	(468)	3,709	(17,642)
Income from continuing operations	1,525	14,053	8,961
Adjustments to reconcile income from continuing operations to net cash provided by (used for) operating activities
Depreciation	24,607	24,712	24,173
Amortization	9,858	10,267	6,999
Non-cash stock-based compensation expense	3,357	4,934	3,115
Deferred taxes	(243)	(315)	(2,665)
Excess tax benefit from stock-based compensation	(64)	(38)	(679)
Impairment charges	9,874	0	0
Other	653	762	562
Payments on performance based compensation	(1,794)	(1,303)	(1,293)
Accrued interest income on note receivable	(1,268)	(1,060)	0
Other long-term liabilities	(579)	1,106	341
Cash flows provided by (used for) working capital
Accounts receivable	4,311	3,499	2,710
Inventories	9,720	5,271	2,377
Prepaid expenses and other assets	1,083	573	(966)
Accounts payable and accrued expenses	(27,319)	(13,107)	8,122
Net cash provided by (used for) operating activities - continuing operations	33,721	49,354	51,757
Net cash provided by (used for) operating activities - discontinued operations	0	(11,622)	(13,062)
Net cash provided by (used for) operating activities	33,721	37,732	38,695
Cash Flows From Investing Activities
Capital expenditures	(12,523)	(23,727)	(24,170)
Acquisition of business, net of cash acquired	0	0	(156,620)
Proceeds from sale of property, plant and equipment	468	1,261	566
Proceeds (payments) related to sale of business	(4,034)	70,762	0
Net cash provided by (used for) investing activities - continuing operations	(16,089)	48,296	(180,224)
Net cash provided by (used for) investing activities - discontinued operations	0	(581)	11,626
Net cash provided by (used for) investing activities	(16,089)	47,715	(168,598)
Cash Flows From Financing Activities
Proceeds from long-term debt	0	0	89,000
Net borrowing (repayments) on credit facility	(3,804)	(37,110)	106,493
Cash dividends paid	(16,221)	(16,675)	(15,707)
Proceeds from issuance of common stock	3,374	2,924	2,926
Excess tax benefit from stock-based compensation	64	38	679
Repurchase of common stock	0	(30,023)	(54,897)
Shares withheld for employee taxes on equity awards	(1,166)	(975)	(1,083)
Deferred financing costs	0	0	(547)
Net cash provided by (used for) financing activities - continuing operations	(17,753)	(81,821)	126,864
Net cash provided by (used for) financing activities - discontinued operations	0	0	0
Net cash provided by (used for) financing activities	(17,753)	(81,821)	126,864
Foreign exchange rate effect on cash	665	(958)	1,176
Net increase (decrease) in cash	544	2,668	(1,863)
Cash at January 1	7,344	4,676	6,539
Cash at December 31	7,888	7,344	4,676
Supplemental Disclosures of Cash Flow Information
Interest	8,917	10,131	4,973
Income taxes	$ 8,136	$ 10,138	$ 11,355