Other Real Estate Owned - Changes in Purchased and Non-Purchased OREO (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Purchased OREO
Balance at January 1, 2017	$ 17,370
Acquired OREO	1,203
Transfers of loans	4,513
Capitalized improvements	0
Impairments	(935)
Dispositions	(8,474)
Other	(381)
Balance at September 30, 2017	13,296
Non Purchased OREO
Balance at January 1, 2017	5,929
Acquired OREO	0
Transfers of loans	905
Capitalized improvements	0
Impairments	(519)
Dispositions	(2,262)
Other	471
Balance at September 30, 2017	4,524
Total OREO
Balance at January 1, 2017	23,299
Acquired OREO	1,203
Transfers of loans	5,418
Capitalized improvements	0
Impairments	(1,454)
Dispositions	(10,736)
Other	90
Balance at September 30, 2017	$ 17,820