Commitments and Contingencies - Future Minimum Cash Lease Commitments Under All Non-Cancelable Leases in Effect for Continuing Operations (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Capital Leases, 2017	$ 46
Capital Leases, 2018	46
Capital Leases, 2019	46
Capital Leases, 2020	46
Capital Leases, 2021	46
Capital Leases, Years thereafter	750
Capital Leases, Total minimum lease payments	980
Capital Leases, Less amount representing interest	(321)
Capital Leases, Total present value of minimum payments	659
Capital Leases, Total present value of minimum payments	659
Capital Leases, Less current portion of obligations	(20)
Capital Leases, Long-term obligations	639
Operating Leases, 2017	4,279
Operating Leases, 2018	4,348
Operating Leases, 2019	4,478
Operating Leases, 2020	4,613
Operating Leases, 2021	4,751
Operating Leases, Years thereafter	595,538
Operating Leases, Total minimum lease payments	$ 618,007