Condensed Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2012	$ 409,770	$ 520	$ 245,002	$ 405,485	$ (253,111)	$ 11,874
Increase (Decrease) in Stockholders' Equity
Net income	8,622			8,622
Other comprehensive income	(5,294)					(5,294)
Issuance of common stock for restricted share awards (825,275 shares), including tax benefit shortfall and award cancellations of $0.9 million	(932)		(15,073)		14,141
Issuance of common stock for the employee stock purchase plan (68,391 shares)	466	1	465
Shares withheld for net settlement of share-based awards (292,878 shares)	(3,562)				(3,562)
Purchase of common stock for treasury (748,100 shares)	(8,953)				(8,953)
Share-based compensation	3,981		3,981
Balance at Mar. 31, 2013	$ 404,098	$ 521	$ 234,375	$ 414,107	$ (251,485)	$ 6,580