Restricted Stock Units Issued and Outstanding (Detail) (2010 Incentive Award Plan, Restricted Stock Units (RSUs), USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
2010 Incentive Award Plan | Restricted Stock Units (RSUs)
Restricted Stock Units
Unvested Beginning Balance	804,000
Granted	460,000
Vested	(395,000)
Forfeited	(60,000)
Unvested Ending Balance	809,000
Expected to vest	795,000
Weighted Average Grant Date Fair Value
Unvested Beginning Balance	$ 10.90
Granted	$ 9.69
Vested	$ 10.99
Forfeited	$ 10.40
Unvested Ending Balance	$ 10.20
Expected to vest	$ 10.20
Weighted Average Remaining Vesting Period (in years)
Unvested at end of period	1 year 11 days
Expected to vest at end of period	1 year 11 days
Aggregate Intrinsic Value
Unvested at end of period	$ 9,089	[1]
Expected to vest at end of period	$ 8,930	[1]

[1] The aggregate intrinsic value is calculated based on the fair value of $11.24 per share of the Company's common stock on December 31, 2013 due to the fact that the restricted stock units carry a $0 purchase price.