Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock Shares	Non-Redeemable Preferred Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock - Common
Beginning balance at Dec. 31, 2011	$ 293,270	$ 2,664	$ 3,000	$ 162,092	$ 153,888	$ (28,374)
Beginning balance, shares at Dec. 31, 2011		26,638,000
Net income	47,044				47,044
Dividends paid on preferred stocks	(300)				(300)
Stock-based compensation	1,237			1,237
Exercise of stock options	543	6		537
Exercise of stock options, shares		65,000
Excess income tax benefit associated with stock-based compensation	353			353
Conversion of redeemable preferred stock to common stock	6			6
Conversion of redeemable preferred stock to common stock, shares		3,000
Ending balance at Sep. 30, 2012	$ 342,153	$ 2,670	$ 3,000	$ 164,225	$ 200,632	$ (28,374)
Ending balance, shares at Sep. 30, 2012		26,706,000