Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities
Net income (loss)	$ 24,333	$ (3,349)	$ (9,889)
Income (loss) from discontinued operations, net of income taxes	118	(1,701)	(20,733)
Income (loss) from continuing operations	24,215	(1,648)	10,844
Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used for) operating activities
Depreciation	15,120	17,638	19,952
Amortization	8,463	8,485	8,886
Accelerated depreciation associated with restructuring activities	0	16	1,993
Non-cash stock-based compensation expense	1,715	4,257	3,626
(Gain) loss on disposal of fixed assets	0	(8)	(3,482)
Provision for loss on note receivable	0	23,008	0
Lease guarantee contingency	0	10,323	0
Loss on extinguishment of debt	0	0	1,888
Deferred taxes	(922)	(9,450)	(5,663)
Interest income accrued on note receivable	0	(361)	(1,384)
Impairment charges	916	308	544
Other	583	457	256
Payments on performance based compensation	(413)	(1,249)	(1,010)
Other long-term liabilities	3,578	180	723
Cash flows provided by (used for) working capital
Accounts receivable	12,479	4,927	(6,709)
Inventories	2,222	3,151	(1,876)
Prepaid expenses and other current assets	(243)	(353)	2,209
Accounts payable and accrued expenses	(20,687)	713	18,299
Net cash provided by (used for) operating activities - continuing operations	47,026	60,394	49,096
Net cash provided by (used for) operating activities - discontinued operations	7,297	858	(4,633)
Net cash provided by (used for) operating activities	54,323	61,252	44,463
Cash Flows From Investing Activities
Capital expenditures	(10,294)	(5,123)	(5,814)
Acquisition of business	(18,000)	0	0
Proceeds from sale of property, plant and equipment	7,537	2,633	11,058
Net cash provided by (used for) investing activities - continuing operations	(20,757)	(2,490)	5,244
Net cash provided by (used for) investing activities - discontinued operations	0	0	(1,107)
Net cash provided by (used for) investing activities	(20,757)	(2,490)	4,137
Cash Flows From Financing Activities
Net repayments of credit facility	0	(74,557)	(16,474)
Repayments of senior unsecured notes	0	0	(23,798)
Cash dividends paid	(19,316)	(17,862)	(16,341)
Proceeds from issuance of common stock	3,336	2,853	4,527
Proceeds from public offering of common stock, net of equity issuance costs	0	79,522	0
Shares withheld for employee taxes on equity awards	(1,008)	(714)	(620)
Deferred financing costs	0	0	(1,030)
Net cash provided by (used for) financing activities - continuing operations	(16,988)	(10,758)	(53,736)
Net cash provided by (used for) financing activities - discontinued operations	0	0	0
Net cash provided by (used for) financing activities	(16,988)	(10,758)	(53,736)
Foreign exchange rate effect on cash	55	(289)	(208)
Less: Net increase (decrease) in cash classified within discontinued operations	0	0	(5,484)
Net increase in cash and restricted cash	16,633	47,715	140
Cash and restricted cash at January 1	58,894	11,179	11,039
Cash and restricted cash at December 31	75,527	58,894	11,179
Supplemental Disclosures of Cash Flow Information
Interest	4,657	6,236	8,913
Income taxes	$ 11,437	$ 5,539	$ 5,651