Income Taxes (Details) - Schedule of Effective Income Tax Rate Reconciliation - 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
Schedule of Effective Income Tax Rate Reconciliation [Abstract]
Income before income tax expense	$ 23,266	$ 18,684	$ 9,770	$ 16,794	$ (5,472)	$ 17,299	$ 15,862	$ 15,169	$ 68,514	$ 42,858	$ 61,237
Federal statutory rate									35.00%	35.00%	35.00%
Computed "expected" Federal income tax expense									$ 23,980	$ 15,000	$ 21,433
State tax, net of Federal tax benefit									213	(701)	812
Impact of Tax Reform Act									5,623
Bank owned life insurance									(1,113)	(896)	(624)
Tax-exempt interest and dividends									(2,123)	(1,714)	(1,584)
Tax benefits from stock based compensation									(348)
Other, net									(938)	87	(111)
Income tax	$ 12,686	$ 5,607	$ 2,087	$ 4,914	$ (3,448)	$ 5,443	$ 5,003	$ 4,778	$ 25,294	$ 11,776	$ 19,926