Income Taxes (Details) - Schedule of Components of Income Tax Expense (Benefit) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal									$ 21,090	$ 10,173	$ 22,512
State									505	(366)	907
Subtotal									21,595	9,807	23,419
Deferred:
Federal									3,876	2,682	(3,835)
State									(177)	(713)	342
Subtotal									3,699	1,969	(3,493)
Income tax expense	$ 12,686	$ 5,607	$ 2,087	$ 4,914	$ (3,448)	$ 5,443	$ 5,003	$ 4,778	$ 25,294	$ 11,776	$ 19,926