Fair Value of Financial Instruments - Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Trust preferred securities
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	$ 992	$ 916
Total Gains (Losses)	76	226
Mortgage servicing assets
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	341
Total Gains (Losses)	(49)
Level 3 | Trust preferred securities
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	992	$ 916
Level 3 | Mortgage servicing assets
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	$ 341