Potentially Dilutive Securities Not Included in Computation of Diluted Net Loss Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
SARs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	28		655		2,201
Anti Dilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Price	$ 12.47		$ 10.98		$ 8.03
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares	748	[1]	762	[1]	1,195	[1]
Anti Dilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Price	$ 8.22	[1]	$ 8.08	[1]	$ 9.18	[1]
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti dilutive Securities Excluded from Computation of Earnings Per Share, Shares					2
Anti Dilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Price					$ 15.80

[1] Anti-dilutive securities include contingently issuable shares unvested as of December 31, 2013, the vesting of which is based on performance conditions and market conditions that have not yet been achieved. See Note 12, “Equity-Based Compensation.”