Stockholders' Equity - Additional Information (Detail) - USD ($)				12 Months Ended
	Dec. 31, 2019	Dec. 30, 2018	Apr. 19, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stockholders Equity [Line Items]
Number of shares converted	1,400,000			1,400,000
2019 Restricted Stock [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage per year				33.33%
Restricted stock, vesting period				3 years
2019 Restricted Stock [Member] | Tranche Three [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage				100.00%
2018 Restricted Stock [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage per year					33.33%
Restricted stock, vesting period					3 years
2018 Restricted Stock [Member] | Tranche Two [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage					100.00%
2017 Restricted Stock [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage per year						33.33%
Restricted stock, vesting period						3 years
2017 Restricted Stock [Member] | Tranche One [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage						100.00%
Performance Based Restricted Stock [Member]
Stockholders Equity [Line Items]
Awards granted	275,119	210,602		221,439
Restricted stock, vesting period				3 years
Restricted Stock Units (RSUs) [Member]
Stockholders Equity [Line Items]
Awards granted				31,833	35,511	37,992
Vesting description				Vesting occurs upon the earliest to occur: (i) the director’s separation from service, (ii) the third anniversary of the grant date, or (iii) the occurrence of a change of control as defined by the agreement.
2016 Plan [Member]
Stockholders Equity [Line Items]
Long term incentive plan, effective date							Apr. 19, 2016
Term of long term incentive plan			10 years
Aggregate number of shares reserved and available for issuance	1,285,922			1,285,922			2,750,000
Minimum exercise price of stock option at grant date				No less than 100% of the fair market value, as defined in the 2016 Plan, of the shares on the date of grant.
Percentage of fair market value							100.00%
Maximum term of stock option							10 years
Options granted				0	0	0
2008 Plan [Member]
Stockholders Equity [Line Items]
Awards granted							0
Options vest at a percentage rate for first 5 years				16.50%
Options final year vesting				end of the sixth year
Total stock based compensation expense not yet recognized, relating to non-vested restricted stock and stock options	$ 3,378,000			$ 3,378,000