Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended	1 Months Ended
	Jul. 25, 2012	Jan. 31, 2012	Jun. 30, 2012	Jun. 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	546,726			196,342	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			535,015
Basic shares repurchased price				5.0
Common stock repurchase, average cost per share	$ 9.59		$ 9.34
Additional repurchase of Basic's shares of common stock			$ 30.2	$ 30.2