Lease Abandonment - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Dec. 31, 2011	Jun. 30, 2014	Dec. 31, 2013
Leases [Abstract]
Non-cash operating charge	$ 2,200,000
Non-cash operating expense charge		400,000
Lease abandonment accrual		$ 1,300,000	$ 1,200,000