Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating Loss Carryforwards [Line Items]
Effective income tax rates	(31.50%)	(9.80%)	(6.40%)	(4.40%)
Income tax expense	$ 2,402,000	$ 2,256,000	$ 1,984,000	$ 2,549,000
Unrecognized tax benefits	1,300,000		1,300,000
United States Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net deferred tax assets	$ 0		$ 0