FAIR VALUE DISCLOSURES (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 are reflected in the following table:

	Fair Value Measurements
(dollars in thousands)	Level 1		Level 2		Level 3	Fair Value
June 30, 2015:
Assets:
Available-for-sale investment securities:
U.S. Government sponsored agencies	$	—	231,983		—	231,983
Residential mortgage-backed	—		948,405		—	948,405
Commercial mortgage-backed	—		18,523		—	18,523
State and political subdivisions	—		28,893		—	28,893
Corporate notes	—		271,743		—	271,743
Equity investments	1,956		—		—	1,956
Mortgage loans held for sale	—		36,428		—	36,428
Derivative instruments:
Interest rate lock commitments	—		655		—	655
Forward commitments to sell mortgage-backed securities	—		448		—	448
Servicing rights	—		19,041		—	19,041
Total	$	1,956	1,556,119		—	1,558,075
December 31, 2014:
Assets:
Available-for-sale investment securities:
U.S. Government sponsored agencies	$	—	231,731		—	231,731
Residential mortgage-backed	—		1,007,844		—	1,007,844
Commercial mortgage-backed	—		837		—	837
State and political subdivisions	—		29,615		—	29,615
Corporate notes	—		173,695		—	173,695
Equity investments	1,967		—		—	1,967
Mortgage loans held for sale	—		31,411		—	31,411
Derivative instruments:
Interest rate lock commitments	—		580		—	580
Forward commitments to sell mortgage-backed securities	—		(294	)	—	(294	)
Servicing rights	—		18,013		—	18,013
Total	$	1,967	1,493,432		—	1,495,399

Fair Value Measurements, Nonrecurring [Table Text Block]

Assets measured at fair value on a nonrecurring basis as of June 30, 2015 and December 31, 2014 are reflected in the following table:

	Fair Value Measurements
(dollars in thousands)	Level 1		Level 2	Level 3	Fair Value
June 30, 2015:
Assets:
Impaired loans:
Commercial, financial and agricultural	$	—	—	5,384	5,384
Real estate construction and development	—		—	2,897	2,897
Real estate mortgage:
Residential mortgage	—		—	78,284	78,284
Home equity	—		—	4,255	4,255
Multi-family residential	—		—	295	295
Commercial real estate	—		—	2,614	2,614
Consumer and installment	—		—	7	7
Other real estate	—		—	12,386	12,386
Total	$	—	—	106,122	106,122
December 31, 2014:
Assets:
Impaired loans:
Commercial, financial and agricultural	$	—	—	8,144	8,144
Real estate construction and development	—		—	3,516	3,516
Real estate mortgage:
Residential mortgage	—		—	82,479	82,479
Home equity	—		—	5,465	5,465
Multi-family residential	—		—	18,574	18,574
Commercial real estate	—		—	7,424	7,424
Consumer and installment	—		—	22	22
Other real estate	—		—	55,666	55,666
Total	$	—	—	181,290	181,290

Fair Value, by Balance Sheet Grouping [Table Text Block]

The estimated fair value of the Company’s financial instruments at June 30, 2015 was as follows:

	June 30, 2015
	Carrying Value		Estimated Fair Value
(dollars in thousands)			Level 1	Level 2	Level 3	Total
Financial Assets:
Cash and cash equivalents	$	238,356	238,356	—	—	238,356
Investment securities:
Available for sale	1,501,503		1,956	1,499,547	—	1,501,503
Held to maturity	587,200		—	583,670	—	583,670
Loans held for portfolio	3,249,663		—	—	3,252,942	3,252,942
Loans held for sale	36,428		—	36,428	—	36,428
FRB and FHLB stock	30,390		N/A	N/A	N/A	N/A
Derivative instruments	1,103		—	1,103	—	1,103
Accrued interest receivable	15,206		15,206	—	—	15,206
Financial Liabilities:
Deposits	$	5,056,525	4,180,414	875,028	—	5,055,442
Securities sold under agreements to repurchase	45,616		45,616	—	—	45,616
Accrued interest payable	842		842	—	—	842
Subordinated debentures	354,324		—	—	273,116	273,116
Liability for Off-Balance Sheet Financial Instruments:
Commitments to extend credit, standby letters of credit and financial guarantees	$	12	—	—	12	12

The estimated fair value of the Company’s financial instruments at December 31, 2014 was as follows:

	December 31, 2014
	Carrying Value		Estimated Fair Value
(dollars in thousands)			Level 1	Level 2	Level 3	Total
Financial Assets:
Cash and cash equivalents	$	205,402	205,402	—	—	205,402
Investment securities:
Available for sale	1,445,689		1,967	1,443,722	—	1,445,689
Held to maturity	618,148		—	614,272	—	614,272
Loans held for portfolio	3,050,958		—	—	2,937,948	2,937,948
Loans held for sale	31,411		—	31,411	—	31,411
FRB and FHLB stock	30,458		N/A	N/A	N/A	N/A
Derivative instruments	286		—	286	—	286
Accrued interest receivable	15,064		15,064	—	—	15,064
Financial Liabilities:
Deposits	$	4,849,504	3,923,627	924,955	—	4,848,582
Securities sold under agreements to repurchase	64,875		64,875	—	—	64,875
Accrued interest payable	831		831	—	—	831
Subordinated debentures	354,286		—	—	303,191	303,191
Liability for Off-Balance Sheet Financial Instruments:
Commitments to extend credit, standby letters of credit and financial guarantees	$	12	—	—	12	12