Commitments and Contingencies - Annual Future Minimum Payments Under Operating Leases / Facility Exit Obligation (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Operating Leases
2019	$ 55,435
2020	60,996
2021	63,348
2022	67,707
2023	72,491
Thereafter	578,874
Operating leases, net of sublease income, total	898,851
Purchase Obligations
2019	55,875
2020	47,062
2021	26,340
2022	6,573
2023	1,896
Thereafter	2,631
Purchase obligation, total	140,377
Other
2019	813
2020	846
2021	862
2022	862
2023	360
Thereafter	0
Other commitment, total	3,743
Total
2019	112,123
2020	108,904
2021	90,550
2022	75,142
2023	74,747
Thereafter	581,505
Total minimum lease payments	1,042,971
Operating leases, cancellation penalty	$ 18,500