Share-Based Compensation - Schedule of Information with Respect to all Outstanding Restricted Stock (Detail) - Restricted Stock Units [Member]	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance of Outstanding Shares | shares	758,000
Granted, Shares | shares	1,556,000
Vested, Shares | shares	(378,000)	[1]
Forfeited, Shares | shares	(192,000)
Ending balance of Outstanding Shares | shares	1,744,000
Beginning balance of Outstanding, Weighted Average Grant-Date Fair Value Per Share | $ / shares	$ 5.55
Granted, Weighted Average Grant-Date Fair Value Per Share | $ / shares	4.58
Vested, Weighted Average Grant-Date Fair Value Per Share | $ / shares	6.00	[1]
Forfeited, Weighted Average Grant-Date Fair Value Per Share | $ / shares	5.12
Ending balance of Outstanding, Weighted Average Grant-Date Fair Value Per Share | $ / shares	$ 4.63

[1] The total vested awards include 9.2 thousand of vested restricted stock units settled in cash. As a result of the termination provision for certain awards, in the event of an involuntary not-for-cause termination of employment by the Company certain termination scenarios allow for cash-settlement.