Other Real Estate Owned (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($) property	Apr. 01, 2015 USD ($)	Dec. 31, 2014 USD ($) property
OREO
Balance at the beginning of the period	$ 26,499	$ 37,398	$ 32,248
Additions	21,419	29,260	33,761
Transfers	2,245
Write-downs	(3,163)	(4,827)	(7,831)
Sold	(22,197)	(35,332)	(25,581)
Balance at the end of the period	24,803	26,499	37,398
Number of properties uncovered | property				118		166
Covered OREO
Balance at the beginning of the period	16,227	27,520	34,257
Additions	9,283	16,555	20,559
Transfers	(2,245)
Write-downs	(6,265)	(5,858)	(278)
Sold	(11,249)	(21,990)	(33,423)
Balance at the end of the period	5,751	16,227	27,520
Number of properties covered by loss share with the FDIC | property				20		113
Total
Balance at the beginning of the period	42,726	64,918	66,505
Additions	30,702	45,815	54,320
Write-downs	(9,428)	(10,685)	(8,109)
Sold	(33,446)	(57,322)	(59,004)
Balance at the end of the period	30,554	42,726	64,918
Number of properties held | property				138		279
Carrying value of other real estate owned	42,726	64,918	66,505	$ 30,554	$ 2,200	$ 42,726
Residential real estate consumer mortgage loans in foreclosure, carrying value				$ 7,700
Number of Real Estate Properties SoldNumber of Real Estate Properties Sold | property				299		557
Number of uncovered properties sold | property				199		253
Number of covered properties by loss share agreements with the FDIC sold | property				100		304
Carrying value of covered OREO assets	$ 16,227	$ 27,520	34,257	$ 5,751		$ 16,227
Residential real estate
Total
Other Real Estate In Foreclosure				$ 3,400
First Financial Holdings, Inc. ("First Financial")
OREO
Additions			4,801
Covered OREO
Additions			6,405
Total
Additions			$ 11,206
Habersham
Total
Percentage of loss covered under loss share agreements with the FDIC	80.00%
CBT
Total
Percentage of loss covered under loss share agreements with the FDIC	95.00%