Build-to-Suit Lease Obligation - Schedule of Expected Reductions (Increases) in Build-to-Suit Lease Obligation (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Leases [Abstract]
Build-to-Suit Lease Obligation, Remainder of 2014	$ 135
Build-to-Suit Lease Obligation, 2015	621
Build-to-Suit Lease Obligation, 2016	(50)
Build-to-Suit Lease Obligation, 2017	24
Build-to-Suit Lease Obligation, 2018	107
Build-to-Suit Lease Obligation, 2019 and thereafter	16,413
Total minimum lease payments	$ 17,250