Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2015	$ (62,593)	$ 928	$ 744,575	$ (809,532)	$ 1,436
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation recognized under stock compensation plans	298		298
Net income (loss)	5,213			5,213
Other comprehensive income (loss)	7,883				7,883
Balance at Dec. 31, 2016	(49,199)	928	744,873	(804,319)	9,319
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of nonvested shares	0	43	(43)
Compensation recognized under stock compensation plans	107		107
Net income (loss)	(10,865)			(10,865)
Other comprehensive income (loss)	2,075				2,075
Balance at Dec. 31, 2017	$ (57,882)	$ 971	$ 744,937	$ (815,184)	$ 11,394