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, 2013	$ 417,432	$ 522	$ 240,057	$ 436,570	$ (268,253)	$ 8,536
Increase (Decrease) in Stockholders' Equity
Net income	13,620			13,620
Other comprehensive income	(1,965)					(1,965)
Issuance of common stock for restricted share awards (865,750 shares),including a net excess tax benefit of $0.7 million	683		(13,442)		14,125
Issuance of common stock for the employee stock purchase plan (32,977 shares)	432		432
Shares withheld for net settlement of share-based awards (311,486 shares)	(5,238)				(5,238)
Purchase of common stock for treasury (743,800 shares)	(12,717)				(12,717)
Share-based compensation	3,759		3,759
Balance at Mar. 31, 2014	$ 416,006	$ 522	$ 230,806	$ 450,190	$ (272,083)	$ 6,571