ACQUISITIONS (Summary of Acquisition-Related Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Combination, Separately Recognized Transactions [Line Items]
Salaries and employee benefits	$ 28,040	$ 17,912	$ 57,666	$ 35,878
Professional services	1,442	663	2,497	1,387
Total	4,661	919	17,829	919
StellarOne Bank [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Salaries and employee benefits	1,158		7,988
Professional services	124	900	3,595	900
Other costs of operations	3,379	19	6,246	19
Total	$ 4,661	$ 919	$ 17,829	$ 919