Stockholders' Equity (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended	1 Months Ended
	Jan. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Jan. 31, 2012 Restricted Stock [Member]	Mar. 31, 2012 Three-Year Period [Member] Restricted Stock [Member]	Mar. 31, 2012 Four-Year Period [Member] Restricted Stock [Member]	Mar. 31, 2011 Five-Year Period [Member]
Class of Stock [Line Items]
Common stock, shares authorized		80,000,000	80,000,000
Common stock, par value		$ 0.01	$ 0.01
Options granted, number of options granted				161,785
Percentage of target number of shares	111.00%
Restricted shares of common stock vesting period, (in years)			three		three	four	three
Restricted shares of common stock granted					644,938	179,000	510,399
Common stock issued from treasury stock		10,000	480,000
Treasury shares acquired, shares		181,476	79,730
Preferred stock, shares authorized		5,000,000	5,000,000
Preferred stock, par value		$ 0.01	$ 0.01