Stock-based Compensation - Summary of SARs Activity (Detail) - SARs [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Beginning Balance | shares	639,146
Granted, Shares | shares	166,518
Exercised, Shares | shares	(104,367)
Forfeited, Shares | shares	(45,880)
Shares, Ending Balance | shares	655,417
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 60.64
Granted, Weighted Average Exercise Price | $ / shares	92.02
Exercised, Weighted Average Exercise Price | $ / shares	51.13
Forfeited, Weighted Average Exercise Price | $ / shares	79.12
Weighted Average Exercise Price, Ending balance | $ / shares	$ 68.83
Weighted Average Remaining Contractual Term, Ending balance	6 years 10 months 20 days
Aggregate Intrinsic Value, Ending balance | $	$ 22,048