Stockholders' Equity - Stockholder's Equity (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Common Stock, Beginning balance	29,554,500	29,554,500	29,554,500
Exercise of options, Common Stock
Stock purchases, Common Stock
Common Stock, Ending balance	29,554,500	29,554,500	29,554,500
Treasury Stock, Beginning balance	4,958,599	5,047,000	5,121,000
Exercise of options, Treasury Stock	(185,000)	(109,000)	(104,000)
Stock purchases, Treasury Stock	7,000	21,000	30,000
Ending balance, Treasury Stock	4,780,806	4,958,599	5,047,000