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Amount of available-for-sale debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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-Paragraph 16

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

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SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013 item	Sep. 30, 2012	Mar. 31, 2012 item	Sep. 30, 2013 item	Sep. 30, 2012	Dec. 31, 2012
Available for sale securities
Amortized Cost	$ 883,674			$ 883,674		$ 862,759
Gross Unrealized Gains	20,108			20,108		39,837
Gross Unrealized Losses	(10,595)			(10,595)		(255)
Fair Value	893,187			893,187		902,341
Available for Sale, Amortized Cost
Within one year	13,579			13,579
One through five years	54,747			54,747
Six through ten years	114,651			114,651
After ten years	143,759			143,759
Total available for sale securities	883,674			883,674		862,759
Available for Sale, Fair Value
Within one year	13,796			13,796
One through five years	56,901			56,901
Six through ten years	118,663			118,663
After ten years	149,881			149,881
Fair Value	893,187			893,187		902,341
Available for sale securities
Proceeds from sales of securities	782	43,290		79,136	64,176
Gross gains realized on sales	2	874		912	1,944
Gross losses realized on sales	0	42		77	77
Number of investments on which impairment loss was recognized			1
Impairment loss recognized			500
Cost basis of one of the equity holdings			250
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	354,684			354,684		52,732
Less than 12 months, Unrealized Losses	(10,478)			(10,478)		(255)
12 months or longer, Fair Value	3,382			3,382
12 months or longer, Unrealized Losses	(117)			(117)
Total Fair Value	358,066			358,066		52,732
Total Unrealized Losses	(10,595)			(10,595)		(255)
Other-Than-Temporary-Impairment
Number of general segments segregated in investment securities portfolio				2
Number of securities in the portfolio				1,045
Number of portfolio securities in unrealized loss position	151			151
U. S. government agency
Available for sale securities
Amortized Cost	918			918		1,600
Gross Unrealized Gains	7			7		38
Fair Value	925			925		1,638
Available for Sale, Amortized Cost
Total available for sale securities	918			918		1,600
Available for Sale, Fair Value
Fair Value	925			925		1,638
State and municipal
Available for sale securities
Amortized Cost	322,283			322,283		310,552
Gross Unrealized Gains	14,245			14,245		27,484
Gross Unrealized Losses	(1,736)			(1,736)		(97)
Fair Value	334,792			334,792		337,939
Available for Sale, Amortized Cost
Total available for sale securities	322,283			322,283		310,552
Available for Sale, Fair Value
Fair Value	334,792			334,792		337,939
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	31,762			31,762		6,646
Less than 12 months, Unrealized Losses	(1,736)			(1,736)		(97)
Total Fair Value	31,762			31,762		6,646
Total Unrealized Losses	(1,736)			(1,736)		(97)
Mortgage-backed securities-residential (Government Sponsored Entity)
Available for sale securities
Amortized Cost	194,050			194,050		219,352
Gross Unrealized Gains	3,976			3,976		7,711
Gross Unrealized Losses	(2,624)			(2,624)		(8)
Fair Value	195,402			195,402		227,055
Available for Sale, Amortized Cost
Debt securities without single maturity date	194,050			194,050
Total available for sale securities	194,050			194,050		219,352
Available for Sale, Fair Value
Debt securities without single maturity date	195,402			195,402
Fair Value	195,402			195,402		227,055
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	87,602			87,602		12,766
Less than 12 months, Unrealized Losses	(2,624)			(2,624)		(8)
Total Fair Value	87,602			87,602		12,766
Total Unrealized Losses	(2,624)			(2,624)		(8)
Collateralized mortgage obligations (Government Sponsored Entity)
Available for sale securities
Amortized Cost	357,949			357,949		322,758
Gross Unrealized Gains	1,880			1,880		4,604
Gross Unrealized Losses	(6,224)			(6,224)		(139)
Fair Value	353,605			353,605		327,223
Available for Sale, Amortized Cost
Debt securities without single maturity date	357,949			357,949
Total available for sale securities	357,949			357,949		322,758
Available for Sale, Fair Value
Debt securities without single maturity date	353,605			353,605
Fair Value	353,605			353,605		327,223
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value	235,320			235,320		32,330
Less than 12 months, Unrealized Losses	(6,118)			(6,118)		(139)
12 months or longer, Fair Value	2,392			2,392
12 months or longer, Unrealized Losses	(106)			(106)
Total Fair Value	237,712			237,712		32,330
Total Unrealized Losses	(6,224)			(6,224)		(139)
Other-Than-Temporary-Impairment
Other than temporary impairment				0
Equity securities
Available for sale securities
Amortized Cost	4,939			4,939		4,939
Fair Value	4,939			4,939		4,939
Available for Sale, Amortized Cost
Debt securities without single maturity date	4,939			4,939
Total available for sale securities	4,939			4,939		4,939
Available for Sale, Fair Value
Debt securities without single maturity date	4,939			4,939
Fair Value	4,939			4,939		4,939
Other securities
Available for sale securities
Amortized Cost	3,535			3,535		3,558
Gross Unrealized Losses	(11)			(11)		(11)
Fair Value	3,524			3,524		3,547
Available for Sale, Amortized Cost
Total available for sale securities	3,535			3,535		3,558
Available for Sale, Fair Value
Fair Value	3,524			3,524		3,547
Securities in a continuous unrealized loss position with unrealized losses presented by length of time
Less than 12 months, Fair Value						990
Less than 12 months, Unrealized Losses						(11)
12 months or longer, Fair Value	990			990
12 months or longer, Unrealized Losses	(11)			(11)
Total Fair Value	990			990		990
Total Unrealized Losses	$ (11)			$ (11)		$ (11)
Other-Than-Temporary-Impairment
Number of single issue trust preferred securities to which the unrealized losses on other securities are related				1