Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Contract Assets and Liabilities (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Contract assets	$ 41,000,000.0	$ 36,500,000
Contract liabilities	32,600,000	32,800,000
Net contract assets	8,400,000	$ 3,700,000
$ Change
Contract assets	4,500,000
Contract liabilities	(200,000)
Net contract assets	$ 4,700,000
% Change
Contract assets	12.30%
Contract liabilities	(0.60%)
Net contract assets	127.00%
Percent of contract liabilities		80.00%
Impairment losses on contract assets	$ 0	$ 0