Shareholders' Equity - Summary of Restricted Stock Awards (Detail) - Restricted Stock [Member] - 2007 Plan [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Summary Of Restricted Stock Unit Activity [Line Items]
Beginning balance , Nonvested shares	1,033	1,047	1,321
Granted , Nonvested shares	755	573	648
Vested , Nonvested shares	(355)	(323)	(284)
Forfeited , Nonvested shares	(255)	(264)	(638)
Ending balance , Nonvested shares	1,178	1,033	1,047
Beginning balance ,Weighted average grant date fair value	$ 7.17	$ 6.00	$ 6.80
Fair value of stock awards granted	5.74	8.19	5.64
Vested , Weighted average grant date fair value	6.80	6.31	7.60
Forfeited , Weighted average grant date fair value	6.41	5.80	5.91
Ending balance , Weighted average grant date fair value	$ 6.53	$ 7.17	$ 6.00