Stockholders' Equity - Activities Under Equity Plan (Detail) (USD $) In Millions, except Share data, unless otherwise specified			28 Months Ended	3 Months Ended	28 Months Ended		0 Months Ended	28 Months Ended
	Sep. 30, 2014	May 16, 2012	Sep. 30, 2014 Short-Term Incentive Plan ("STIP") [Member]	Sep. 30, 2014 Restricted Stock Units [Member] 2011 LTIP [Member]	Sep. 30, 2014 Restricted Stock Units [Member] 2011 LTIP [Member]	Sep. 30, 2014 Common Stock [Member]	Jul. 08, 2014 Common Stock [Member] Two Thousand Twelve Equity Plan [Member]	Sep. 30, 2014 Restricted Stock [Member] Non-executive directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total equity securities available at May 16, 2012		2,194,986
Add: 2011 LTIP RSUs forfeited by eligible employees				0	209,382			3,189
Less: Equity Plan shares awarded			(41,702)	0	(557,484)	(5,820)	(5,820)	(47,855)
Total equity securities available at September 30, 2014	1,754,696
Adjustment of Warrants Granted for Services							$ 0.1
Granted, Weighted Average Grant Date Fair Value				$ 0.00			$ 15.74