Nature of Operations and Presentation of Condensed Consolidated Financial Statements - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2019	Mar. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash paid for interest		$ 6,600	$ 6,400
Net cash (refund) paid for income taxes		(1,600)	6,300
Noncash or part noncash acquisition, fixed assets acquired		9,000	$ 11,600
Operating lease, right-of-use asset		17,351
Operating lease, liability		$ 17,732
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