Other Real Estate Owned (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) property	Jun. 30, 2014 USD ($) property
OREO
Balance at the beginning of the period	$ 26,499	$ 37,398
Additions	9,165	13,781
Transfers	2,245
Write-downs	(1,517)	(2,480)
Sold	(9,522)	(16,964)
Balance at the end of the period	$ 26,870	$ 31,735
Number of properties uncovered | property	133	200
Covered OREO
Balance at the beginning of the period	$ 16,227	$ 27,520
Additions	3,554	11,680
Transfers	(2,245)
Write-downs	(2,797)	(3,244)
Sold	(6,567)	(13,958)
Balance at the end of the period	$ 8,172	$ 21,998
Number of properties covered by loss share with the FDIC | property	29	201
Total
Balance at the beginning of the period	$ 42,726	$ 64,918
Additions	12,719	25,461
Write-downs	(4,314)	(5,724)
Sold	(16,089)	(30,922)
Balance at the end of the period	$ 35,042	$ 53,733
Number of properties held | property	162	401
Residential real estate included in OREO	$ 3,900
Residential real estate consumer mortgage loans in foreclosure process	$ 9,700