CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2011	$ 395	$ 286,869	$ (1,987)	$ 95,849	$ (48,207)	$ 332,919
Balance (in shares) at Dec. 31, 2011	39,494,000				(3,740,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)				22,427		22,427
Foreign currency translation adjustment, net of $0 tax in all years			555			555
Tax benefit/deficiency from share-based compensation		(315)				(315)
Restricted common stock issued under share-based compensation plans	4					4
Restricted common stock issued under share-based compensation plans (in shares)	430,000
Stock option exercises		(2,208)			3,088	880
Stock option exercises (in shares)					240,000
Common stock repurchased under share-based compensation plans					(2,689)	(2,689)
Common stock repurchased under share-based compensation plans (in shares)					(217,000)	(217,713)
Share repurchases (Note 7)					(3,299)	(3,299)
Share repurchases (Note 7) (in shares)					(284,000)
Dividends declared ($0.36, $0.36 and $0.385 per share for the year ended December 31, 2014, 2013 and 2012 respectively) (Note 7)				(13,831)		(13,831)
Share-based compensation expense		6,719				6,719
Balance at Dec. 31, 2012	399	291,065	(1,432)	104,445	(51,107)	343,370
Balance (in shares) at Dec. 31, 2012	39,924,000				(4,001,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)				11,110		11,110
Foreign currency translation adjustment, net of $0 tax in all years			891			891
Tax benefit/deficiency from share-based compensation		2,828				2,828
Restricted common stock issued under share-based compensation plans	4	(2,020)			2,020	4
Restricted common stock issued under share-based compensation plans (in shares)	375,000				153,000
Stock option exercises		(7,466)			10,467	3,001
Stock option exercises (in shares)					780,000
Common stock repurchased under share-based compensation plans					(6,515)	(6,515)
Common stock repurchased under share-based compensation plans (in shares)					(471,000)	(471,248)
Share repurchases (Note 7)					(22,881)	(22,881)
Share repurchases (Note 7) (in shares)					(1,768,000)
Dividends declared ($0.36, $0.36 and $0.385 per share for the year ended December 31, 2014, 2013 and 2012 respectively) (Note 7)				(12,801)		(12,801)
Share-based compensation expense		7,007				7,007
Balance at Dec. 31, 2013	403	291,414	(541)	102,754	(68,016)	326,014
Balance (in shares) at Dec. 31, 2013	40,299,000				(5,307,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)				(1,337)		(1,337)
Foreign currency translation adjustment, net of $0 tax in all years			(2,411)			(2,411)
Unrealized losses on cash flow hedges			(1,410)			(1,410)
Tax benefit/deficiency from share-based compensation		(966)				(966)
Restricted common stock issued under share-based compensation plans	5	(1,478)			4,479	3,006
Restricted common stock issued under share-based compensation plans (in shares)	537,000				347,000
Stock option exercises		(1,467)			13,965	12,498
Stock option exercises (in shares)					1,081,000
Common stock repurchased under share-based compensation plans					(3,982)	(3,982)
Common stock repurchased under share-based compensation plans (in shares)					(276,000)	(323,090)
Dividends declared ($0.36, $0.36 and $0.385 per share for the year ended December 31, 2014, 2013 and 2012 respectively) (Note 7)				(13,026)		(13,026)
Share-based compensation expense		6,551				6,551
Balance at Dec. 31, 2014	$ 408	$ 294,054	$ (4,362)	$ 88,391	$ (53,554)	$ 324,937
Balance (in shares) at Dec. 31, 2014	40,836,000				(4,155,000)