Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Statutory Federal income tax rate	21.00%	35.00%	35.00%
Provisional income tax expense relating to from Tax Reform		$ 19,000,000
Realization of deferred tax asset	$ 54,100,000
Future taxable income	191,200,000
Unrecognized tax benefits that would impact effective tax rate	1,000,000	600,000
Interest and penalties recognized	57,000	(4,000)
Accrued interest and penalties on unrecognized tax benefits	137,000	$ 88,000
U.S. Federal
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 37,900,000
Federal net operating loss carry forward expiration year	2031
State and Local Jurisdiction [Member]
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 21,200,000
Federal net operating loss carry forward expiration year	2023
ATM
Income Tax Disclosure [Abstract]
AMT credit carryforward	$ 978,000