Stockholders' Equity (Narrative) (Details) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended
	Feb. 28, 2014	Jan. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Feb. 28, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Class of Stock [Line Items]
Common stock, shares authorized			80,000,000	80,000,000
Common stock, par value			$ 0.01	$ 0.01
Common stock issued from treasury stock					133,200
Issued common stock for the exercise of stock options			250,000	107,250	0
Restricted stock granted	283,223		1,032,125
Percentage of target number of shares		106.00%
Treasury shares acquired, total price			$ 12,733,000	$ 3,605,000	$ 18,497,000
Preferred stock, shares authorized			5,000,000	5,000,000
Preferred stock, par value			$ 0.01	$ 0.01
Preferred stock, shares issued			0	0
Preferred stock, shares outstanding			0	0
Net Share Settlements
Class of Stock [Line Items]
Treasury shares acquired, shares			254,604	154,225
Restricted Stock
Class of Stock [Line Items]
Restricted stock granted						42,513
Percentage of target number of shares						25.00%
Three-Year Period
Class of Stock [Line Items]
Restricted shares of common stock granted								414,900	432,400	646,438
Restricted shares of common stock vesting period, (in years)			3 years
Restricted stock granted							122,915
Percentage of target number of shares							42.90%
Four-Year Period
Class of Stock [Line Items]
Restricted shares of common stock granted								294,909	262,000	179,000
Restricted shares of common stock vesting period, (in years)			4 years
Share Repurchase Program
Class of Stock [Line Items]
Repurchase of basic share of common stock				50,000,000
Common stock repurchase, average cost per share				$ 6.95
Additional repurchase of Basic's shares of common stock			13,900,000
Treasury shares acquired, shares				921,059
Treasury shares acquired, total price				$ 6,400,000