Stockholders' Equity (Change in Retained Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 798,370
Net loss	(47,327)	$ (37,062)
Repurchase of common stock	(45,401)
Balance, end of period	$ 705,642