Compensation - Activity Associated with Stock Options (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, Balance outstanding at beginning of period	4,491,238
Options granted in period
Options exercised in period
Options forfeited in period	(513,000)
Options, Balance outstanding at end of period	3,978,238	4,491,238
Weighted-Average Exercise Price, Outstanding at Beginning of Period	$ 11.60
Granted options, Weighted-Average Exercise Price
Exercised options, Weighted-Average Exercise Price
Forfeited options, Weighted-Average Exercise Price	$ 16.89
Weighted-Average Exercise Price, Outstanding at End of Period	$ 10.85	$ 11.60
Weighted-Average Remaining Contractual Term, Options Outstanding	1 year 6 months	2 years
Aggregate intrinsic value, options outstanding