Nature of Operations and Presentation of Condensed Consolidated Financial Statements - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jan. 01, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash paid for interest			$ 21,600	$ 22,100
Net cash income taxes paid (refunded)			2,900	900
Noncash or part noncash acquisition, fixed assets acquired			18,100	8,300
Operating lease, right-of-use asset			16,903
Operating lease, liability			$ 17,314
Reclassification of non-controlling redeemable equity translation adjustments		$ 2,900		$ 2,900
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 18,200
Operating lease, liability	18,600
Deferred rent write off	$ 400