Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended
	Jan. 31, 2012	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011	Jan. 31, 2012 Restricted Stock [Member]	Mar. 31, 2012 Three-Year Period [Member] Restricted Stock [Member]	Mar. 31, 2011 Three-Year Period [Member] Restricted Stock [Member]	Mar. 31, 2012 Four-Year Period [Member] Restricted Stock [Member]
Class of Stock [Line Items]
Restricted stock granted					161,785
Restricted shares of common stock vesting period, (in years)					3 years	3 years	3 years	4 years
Restricted shares of common stock granted						646,438	510,399	179,000
Stockholders' Equity (Textual) [Abstract]
Common stock, shares authorized		80,000,000	80,000,000	80,000,000
Common stock, par value		$ 0.01	$ 0.01	$ 0.01
Percentage of target number of shares	111.00%
Common stock issued from treasury stock			105,700	480,000
Treasury shares acquired, shares			202,506	79,730
Preferred stock, shares authorized		5,000,000	5,000,000	5,000,000
Preferred stock, par value		$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares issued
Preferred stock, shares outstanding		0	0	0
Repurchase of basic share of common stock			$ 50.0
Number of basic shares repurchased		661,773
Basic shares repurchased price		6.4
Common stock repurchase, average cost per share		$ 9.64
Additional repurchase of Basic's shares of common stock		$ 23.8	$ 23.8