Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 872	$ 437	$ 322	$ 321	$ 320	$ 321	$ 327	$ 332	$ 643	$ 659	$ 1,080	$ 980	$ 1,952	$ 1,300	$ 1,320
Estimated intangible asset amortization expense in 2020	3,500												3,500
Estimated intangible asset amortization expense 2021	1,200												1,200
Estimated intangible asset amortization expense 2022	1,200												1,200
Estimated intangible asset amortization expense 2023	1,200												1,200
Estimated intangible asset amortization expense in 2024	$ 2,900												$ 2,900