Equity Incentive Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options exercised	$ 1,254,000	$ 3,351,000	$ 1,972,000
Fair value of options vested	$ 2,118,000	$ 2,819,000	$ 4,354,000
Time Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares reserved	1,319,000	1,744,000	5,309,000
Options vested granted percentage	20.00%
Unrecognized compensation cost	$ 1,893,000
Unrecognized compensation cost weighted-average recognition period	30 months
Options vesting description	The Company’s time-based options principally vest 20% on each anniversary date.
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	2,808,400
Options, Average grant date fair value	$ 3.09
Compensation expense	$ 0
Share based stock awards vesting period		3 years
Performance Shares [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share issuable based on performance		2,834,390
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expect to vest based on service condition		358,506
Number of share of stock issued for each award		1
Service Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	2,033,000	$ 1,174,000
Unrecognized compensation cost	$ 2,158,000	$ 1,817,000
Service Based Awards [Member] | Vesting Period 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested granted percentage		0.333%
Service Based Awards [Member] | Vesting Period 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested granted percentage		0.333%
Service Based Awards [Member] | Vesting Period 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested granted percentage		0.333%
2012 Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares reserved	15,316,000