Subordinated Debentures Activities for our subordinated debentures (Details) - Subordinated Debentures - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Average balance outstanding	$ 70,310	$ 30,858
Maximum amount outstanding at any month-end during the year	70,310	70,310
Balance outstanding at end of year	$ 70,310	$ 70,310
Weighted average interest rate during the year (as a percent)	5.36%	5.00%