Compensation - Activity Associated with Stock Options (Detail) (USD $)	6 Months Ended	12 Months Ended
	Jun. 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	(509,000)
Options, Balance outstanding at end of period	3,982,238	4,491,238
Number of options exercisable	3,982,238
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	$ 20.09
Weighted-Average Exercise Price, Outstanding at End of Period	$ 10.85	$ 11.60
Options Exercisable, Weighted-Average Exercise Price	$ 10.85
Weighted-Average Remaining Contractual Term, Options Outstanding	1 year 9 months 18 days	2 years
Options Exercisable, Weighted-Average Remaining Contractual Term	1 year 9 months 18 days
Aggregate intrinsic value, options outstanding
Aggregate intrinsic value, options exercisable