Stockholders' Equity - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Treasury stock, shares	3,979,735	3,803,043
Shares purchased during period	144,457	205,983	76,790
Treasury stock distributed under deferred compensation plan	7,884
Stock purchased to settle employees statutory withholding taxes relates to performance stock awards and deferred compensation distribution	40,119
Open Market Repurchases [Member]
Class Of Stock [Line Items]
Shares purchased during period	144,457