Earnings Per Share - Computation of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 195,960	$ 143,453	$ 180,576
Less: income allocable to participating securities			(81)
Income allocable to common shares	195,960	143,453	180,495
Add back: undistributed earnings allocable to participating securities			81
Less: undistributed earnings reallocated to participating securities			(80)
Numerator for diluted earnings per share	$ 195,960	$ 143,453	$ 180,496
Denominator:
Basic weighted average shares outstanding	57,885	57,620	57,561
Dilutive effect of unvested restricted stock	306	665	834
Diluted weighted average shares outstanding	58,191	58,285	58,395
Earnings per share:
Earnings per share, basic	$ 3.39	$ 2.49	$ 3.14
Earnings per share, diluted	$ 3.37	$ 2.46	$ 3.09