Condensed Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2011	$ 671,114		$ 519	$ 249,469	$ 653,344	$ (240,559)	$ 8,341
Increase (Decrease) in Stockholders' Equity
Net income	5,458				5,458
Other comprehensive income	2,701						2,701
Issuance of common stock for restricted share awards (470,427 shares) and employee stock unit awards (71,610 shares), net of tax benefit decrease of $2.6 million	(545)			(10,699)		10,154
Awards classified to liability for cash settlement (259,840 shares)	(2,612)			(2,612)
Issuance of common stock for the employee stock purchase plan (62,481 shares)	602		1	601
Shares withheld for net settlement of share-based awards (202,052 shares)	(2,250)					(2,250)
Purchase of common stock for treasury (820,000 shares)	(9,062)					(9,062)
Share-based compensation	598			598
Balance at Mar. 31, 2012	$ 666,004		$ 520	$ 237,357	$ 658,802	$ (241,717)	$ 11,042