Summary of Significant Accounting Policies - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Comprehensive Income Loss Tax Parenthetical Disclosures [Abstract]
Tax expense (benefit) on unrealized gain (loss) on investments		$ (4)	$ 22
Tax on reclassification adjustment for net losses realized in net income, net of tax		$ (75)
Tax expense (benefit) on unrealized loss on interest rate swap	$ 40