New Accounting Standards (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2018
New Accounting Standards [Abstract]
Non-interest income		$ 6,824		$ 13,102
Interchange Income [Member]
New Accounting Standards [Abstract]
Non-interest income		2,504		4,750
Interchange Expense [Member]
New Accounting Standards [Abstract]
Non-interest expense		661		1,529
Investment and Insurance Commissions [Member]
New Accounting Standards [Abstract]
Non-interest income		483		921
ASU 2018-02 [Member]
New Accounting Standards [Abstract]
Reclassification of certain deferred tax effects			$ 40
Under Legacy GAAP [Member] | Interchange Income [Member]
New Accounting Standards [Abstract]
Non-interest income		2,144		4,082
Under Legacy GAAP [Member] | Interchange Expense [Member]
New Accounting Standards [Abstract]
Non-interest expense		301		591
Impact [Member]
New Accounting Standards [Abstract]
Impact on net income		0		0
Impact [Member] | ASU 2014-09 [Member] | Interchange Income [Member]
New Accounting Standards [Abstract]
Non-interest income	[1]	360		668
Impact [Member] | ASU 2014-09 [Member] | Interchange Expense [Member]
New Accounting Standards [Abstract]
Non-interest expense	[1]	$ 360		$ 668

[1] Represents certain costs charged by payment networks that were previously netted against interchange income.