Mergers and Acquisitions (Details 4) (USD $)	12 Months Ended		0 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Feb. 15, 2012 SCBT, N.A. (the "Bank") Habersham	Feb. 18, 2011 SCBT, N.A. (the "Bank") Habersham item	Dec. 31, 2011 SCBT, N.A. (the "Bank") Habersham	Dec. 31, 2012 SCBT, N.A. (the "Bank") Habersham item	Jun. 30, 2011 SCBT, N.A. (the "Bank") Habersham item	May 19, 2011 SCBT, N.A. (the "Bank") Habersham item
Mergers and Acquisitions
Number of branches operated				8
Discount received on the assets acquired				$ 38,300,000
Percentage of loan and foreclosed real estate losses covered by FDIC				80.00%
Period of loss sharing and bank reimbursement to FDIC applicable to single family assets (loans and OREO)				10 years
FDIC loss sharing period applicable to commercial assets (loans and OREO)				5 years
Period of bank reimbursement to FDIC applicable to commercial assets (loans and OREO)				8 years
Number of bank facilities, planned for acquisition as notified to FDIC								4
Appraised value of facilities planned for acquisition as notified to FDIC								6,700,000
Value of furniture or equipment planned to be purchased as notified to FDIC								362,000
Number of locations retained by the Bank related to which furniture or equipment are planned to be purchased								5
Amount paid in settlement for purchases of furniture and equipment and other settlement items			7,200,000
Number of banking facilities which includes both leased and owned locations						5
Number of branches closed							3
Merger-related expense					2,600,000
Consideration:
Gain on acquisition (noninterest income)	$ 16,529,000	$ 98,081,000			$ 5,500,000