Other Borrowings - Federal Funds Purchased (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Disclosure [Abstract]
Average balance during the period	$ 107,125	$ 29,272	$ 104,144	$ 14,636
Maximum month-end balance during the period	$ 137,450	$ 57,300	$ 137,450	$ 57,300
Weighted average rate during the period	0.89%	0.54%	0.86%	0.54%