Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2018	$ 446,279	$ 797	$ 267,670	$ 883,975	$ (691,747)	$ (14,416)
Beginning Balance, Shares at Dec. 31, 2018		79,652
Net income (loss)	770			770
Adoption of new accounting standards	4			(381)		385
Other comprehensive income (loss), net of tax	(854)					(854)
Dividend payments ($0.09 per share)	(4,301)			(4,301)
Dividends accrued on unvested RSUs	(18)			(18)
PSUs, RSUs and restricted stock vested	(8)			(865)	857
Purchases of treasury stock	(184)				(184)
Stock-based compensation expense	1,859		1,859
Ending Balance at Mar. 31, 2019	443,547	$ 797	269,529	879,180	(691,074)	(14,885)
Ending Balance, Shares at Mar. 31, 2019		79,652
Beginning Balance at Dec. 31, 2019	$ 380,426	$ 797	274,632	806,702	(685,288)	(16,417)
Beginning Balance, Shares at Dec. 31, 2019	79,652	79,652
Net income (loss)	$ (9,969)			(9,969)
Other comprehensive income (loss), net of tax	(1,392)					(1,392)
Dividend payments ($0.09 per share)	(4,328)			(4,328)
Dividends accrued on unvested RSUs	(32)			(32)
Deferred compensation adjustments, net of tax	(2,758)				(2,758)
PSUs, RSUs and restricted stock vested	(23)			(1,524)	1,501
Stock-based compensation expense	1,791		1,791
Ending Balance at Mar. 31, 2020	$ 363,715	$ 797	$ 276,423	$ 790,849	$ (686,545)	$ (17,809)
Ending Balance, Shares at Mar. 31, 2020	79,652	79,652