Stock-Based Compensation - Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shares
Options granted (in shares)	0	0
Stock Option [Member]
Shares
Outstanding, Beginning Balance (in shares)	410,000	569,000
Options granted (in shares)	0	0
Options exercised (in shares)	0	(15,000)
Options canceled/forfeited (in shares)	(231,000)	(144,000)
Outstanding, Ending Balance (in shares)	179,000	410,000
Options exercisable (in shares)	89,000
Shares available for future grant (in shares)	2,602,000
Weighted Average Exercise Price
Outstanding, Beginning Balance (in dollars per share)	$ 14.66	$ 14.74
Options granted (in dollars per share)	0.00	0.00
Options exercised (in dollars per share)	0.00	12.29
Options canceled/forfeited (in dollars per share)	14.19	15.21
Outstanding, Ending Balance (in dollars per share)	15.27	$ 14.66
Options exercisable (in dollars per share)	$ 15.38
Weighted Average Remaining Contractual Life
Outstanding, contractual life (in years)	1 year 7 months 24 days
Options exercisable (in years)	1 year 4 months 6 days
Aggregate Intrinsic Value
Outstanding intrinsic value	$ 0
Options exercisable	$ 0