IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio and Related Allowance (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Carrying Value
Individually Evaluated for Impairment	$ 47,911	$ 52,969
Collectively Evaluated for Impairment	1,343,171	1,251,238
Total	1,391,082	1,304,207
Associated Allowance
Individually Evaluated for Impairment	4,436	5,446
Collectively Evaluated for Impairment	13,135	14,622
Total	17,571	20,068
Construction and Land Development [Member]
Carrying Value
Individually Evaluated for Impairment	3,084	3,681
Collectively Evaluated for Impairment	54,767	63,769
Total	57,851	67,450
Associated Allowance
Individually Evaluated for Impairment	372	149
Collectively Evaluated for Impairment	542	659
Total	914	808
Commercial Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	14,185	12,418
Collectively Evaluated for Impairment	556,474	507,964
Total	570,659	520,382
Associated Allowance
Individually Evaluated for Impairment	662	638
Collectively Evaluated for Impairment	3,829	5,522
Total	4,491	6,160
Residential Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	29,670	35,731
Collectively Evaluated for Impairment	593,595	557,015
Total	623,265	592,746
Associated Allowance
Individually Evaluated for Impairment	3,279	4,528
Collectively Evaluated for Impairment	7,319	7,131
Total	10,598	11,659
Commercial And Financial [Member]
Carrying Value
Individually Evaluated for Impairment	156	166
Collectively Evaluated for Impairment	91,144	78,470
Total	91,300	78,636
Associated Allowance
Individually Evaluated for Impairment	8	13
Collectively Evaluated for Impairment	787	697
Total	795	710
Consumer [Member]
Carrying Value
Individually Evaluated for Impairment	816	973
Collectively Evaluated for Impairment	47,191	44,020
Total	48,007	44,993
Associated Allowance
Individually Evaluated for Impairment	115	118
Collectively Evaluated for Impairment	658	613
Total	$ 773	$ 731