Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Summary Of Other Intangible Assets [Line Items]
Gross carrying amount	$ 85,354	$ 83,061
Accumulated amortization	30,119	22,882
Net carrying amount	55,235	60,179
Gross carrying amount	94,993	92,718
Accumulated amortization	30,119	22,882
Net carrying amount	64,874	69,836
Developed Technology [Member]
Summary Of Other Intangible Assets [Line Items]
Gross carrying amount	56,385	54,530
Accumulated amortization	20,654	15,517
Net carrying amount	$ 35,731	$ 39,013
Developed Technology [Member] | Minimum [Member]
Summary Of Other Intangible Assets [Line Items]
Weighted-average useful life of acquired finite-lived intangible assets	4 years	4 years
Developed Technology [Member] | Maximum [Member]
Summary Of Other Intangible Assets [Line Items]
Weighted-average useful life of acquired finite-lived intangible assets	6 years	6 years
Customer Relationships
Summary Of Other Intangible Assets [Line Items]
Gross carrying amount	$ 28,750	$ 28,422
Accumulated amortization	9,405	7,309
Net carrying amount	$ 19,345	$ 21,113
Customer Relationships | Minimum [Member]
Summary Of Other Intangible Assets [Line Items]
Weighted-average useful life of acquired finite-lived intangible assets	7 years	7 years
Customer Relationships | Maximum [Member]
Summary Of Other Intangible Assets [Line Items]
Weighted-average useful life of acquired finite-lived intangible assets	10 years	10 years
Other Intangibles [Member]
Summary Of Other Intangible Assets [Line Items]
Weighted-average useful life of acquired finite-lived intangible assets	10 years	10 years
Gross carrying amount	$ 219	$ 109
Accumulated amortization	60	56
Net carrying amount	159	53
Trade Names
Summary Of Other Intangible Assets [Line Items]
Net carrying amount	$ 9,639	$ 9,657