Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities
Net income (loss)	$ 17,762	$ (8,681)	$ 26,002
Income (loss) from discontinued operations, net of income taxes	3,709	(17,642)	(440)
Income from continuing operations	14,053	8,961	26,442
Adjustments to reconcile income from continuing operations to net cash provided by (used for) operating activities
Depreciation	24,712	24,173	20,386
Amortization	10,267	6,999	3,142
Non-cash stock compensation	4,934	3,115	2,557
Deferred taxes	(315)	(2,665)	(2,729)
Tax benefit from options	(38)	(679)	(390)
Other	762	562	1,257
Payments on performance based compensation	(1,303)	(1,293)	(1,719)
Accrued interest income on note receivable	(1,060)	0	0
Other long-term liabilities	1,106	341	(978)
Cash flows provided by (used for) working capital
Accounts receivable	3,499	2,710	(1,964)
Inventories	5,271	2,377	3,011
Prepaid expenses and other assets	573	(966)	(840)
Accounts payable and accrued expenses	(13,107)	8,122	26,758
Net cash provided by (used for) operating activities - continuing operations	49,354	51,757	74,933
Net cash provided by (used for) operating activities - discontinued operations	(11,622)	(13,062)	21,135
Net cash provided by (used for) operating activities	37,732	38,695	96,068
Cash Flows From Investing Activities
Capital expenditures	(23,727)	(24,170)	(20,709)
Acquisition of business, net of cash acquired	0	(156,620)	(600)
Proceeds from sale of property, plant and equipment	1,261	566	0
Proceeds from sale of business	70,762	0	0
Other	0	0	(273)
Net cash provided by (used for) investing activities - continuing operations	48,296	(180,224)	(21,582)
Net cash provided by (used for) investing activities - discontinued operations	(581)	11,626	(8,359)
Net cash provided by (used for) investing activities	47,715	(168,598)	(29,941)
Cash Flows From Financing Activities
Proceeds from long-term debt	0	89,000	11,000
Repayments on long-term debt	0	0	(32,683)
Net (repayments) borrowing on credit facility	(37,110)	106,493	(24,492)
Cash dividends paid	(16,675)	(15,707)	(9,103)
Proceeds from issuance of common stock	2,924	2,926	5,805
Tax benefit from options	38	679	390
Repurchase of common stock	(30,023)	(54,897)	(8,096)
Shares withheld for employee taxes on equity awards	(975)	(1,083)	(684)
Deferred financing costs	0	(547)	(608)
Net cash provided by (used for) financing activities - continuing operations	(81,821)	126,864	(58,471)
Net cash provided by (used for) financing activities - discontinued operations	0	0	(2,317)
Net cash provided by (used for) financing activities	(81,821)	126,864	(60,788)
Foreign exchange rate effect on cash	(958)	1,176	(2,748)
Net increase (decrease) in cash	2,668	(1,863)	2,591
Cash at January 1	4,676	6,539	3,948
Cash at December 31	7,344	4,676	6,539
Supplemental Disclosures of Cash Flow Information
Interest	10,131	4,973	4,196
Income taxes	$ 10,138	$ 11,355	$ 12,321