Federal Home Loan Bank Advances and Other Borrowings Activities in advances from the FHLB (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Activities in advances from the FHLB
Average balance outstanding	$ 139,542	$ 70,296
Maximum amount outstanding at any month-end during the year	340,000	210,000
Balance outstanding at end of year	$ 148,000	$ 70,000
Weighted average rate for securities sold under agreement to repurchase (as a percent)	0.39%	0.26%