Lease Agreements - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) integer
Schedule of Operating Leases [Line Items]
Number of properties where non-cancelable long-term leases are in effect | integer	17
2019	$ 92,885
2020	92,759
2021	37,252
2022	19,561
2023	19,225
Thereafter	83,072
Total	$ 344,754
Minimum
Schedule of Operating Leases [Line Items]
Operating leases, term of contract (in years)	1 year
Maximum
Schedule of Operating Leases [Line Items]
Operating leases, term of contract (in years)	10 years