Summary of Significant Accounting Policies (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 item
Intangible Assets
Impairment Charges	$ 0
Transfer of Financial Assets
Term of fixed-rate mortgage loans	30 years
Number of interest rate swaps contracts that were classified as non-designated hedges acquired through merger	2
Reclassification
Number of categories considered for allocation of the carrying value of loans	3
Savannah
Transfer of Financial Assets
Number of interest rate swaps held to facilitate a risk management strategy	1
Minimum
Intangible Assets
Estimated useful lives of intangibles	2 years
Maximum
Intangible Assets
Estimated useful lives of intangibles	15 years
Core deposit intangibles | Minimum
Intangible Assets
Estimated useful lives of intangibles	7 years
Core deposit intangibles | Maximum
Intangible Assets
Estimated useful lives of intangibles	13 years
Noncompete intangibles | Minimum
Intangible Assets
Estimated useful lives of intangibles	2 years
Noncompete intangibles | Maximum
Intangible Assets
Estimated useful lives of intangibles	3 years
Client list intangibles
Intangible Assets
Estimated useful lives of intangibles	15 years
PCCRs intangible
Intangible Assets
Estimated useful lives of intangibles	10 years