Fair Value Measurements - (Details 3) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Impaired loans measured at fair value on a nonrecurring basis
Impaired loans	$ 6,614	$ 6,508
OREO	4,976	12,839
Mortgage servicing rights	17,206
Total	28,796	19,347
Level 1
Impaired loans measured at fair value on a nonrecurring basis
Impaired loans	0	0
OREO	0	0
Mortgage servicing rights	0
Total	0	0
Level 2
Impaired loans measured at fair value on a nonrecurring basis
Impaired loans	0	0
OREO	0	0
Mortgage servicing rights	0
Total	0	0
Level 3
Impaired loans measured at fair value on a nonrecurring basis
Impaired loans	6,614	6,508
OREO	4,976	12,839
Mortgage servicing rights	17,206
Total	$ 28,796	$ 19,347