Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Real Estate Properties [Line Items]
Mortgage Loans in Process of Foreclosure, Amount			$ 15,600	$ 24,800
Covered
Beginning Balance	$ 22,982	$ 47,081
Additions	7,357	29,708
Sales	(19,629)	(38,753)
Writedowns	(1,478)	(10,853)
Other Real Estate Covered Transfers	(2,415)	(5,537)
Noncovered
Beginning balance	70,454	36,898
Additions	47,866	36,574
Sales	(56,853)	(48,935)
Writedowns	(5,140)	(5,219)
Other Real Estate Non Covered Transfers	2,415	5,537
Total
Beginning balance	93,436	83,979
Additions	55,223	66,282
Sales	(76,482)	(87,688)
Writedowns	(6,618)	(16,072)
Other Real Estate Transfers	0	0
Ending balance	93,436	83,979	65,559	93,436
Bancorporation
Covered
Additions		1,300
Noncovered
Additions		34,000
Total
Additions		35,300
1st Financial
Covered
Additions		0
Noncovered
Additions		11,600
Total
Additions		$ 11,600
Mortgage
Total
Beginning balance	29,048
Ending balance	$ 29,048		$ 16,071	$ 29,048