2. INVESTMENT SECURITIES - Investment securities with unrealized losses (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Less than 12 months, Estimated Fair Value	$ 22,312	$ 178,696
Less than 12 months, Unrealized Loss	(29)	(6,752)
12 months or more, Estimated Fair Value	104,576	22,051
12 months or more, Unrealized Loss	(2,917)	(2,256)
Total Estimated Fair Value	126,888	200,747
Total Unrealized Loss	(2,946)	(9,008)
Obligations of U.S. government sponsored agencies
Less than 12 months, Estimated Fair Value	20,318	18,198
Less than 12 months, Unrealized Loss	(23)	(1,471)
12 months or more, Estimated Fair Value	98,443	0
12 months or more, Unrealized Loss	(2,050)	0
Total Estimated Fair Value	118,761	18,198
Total Unrealized Loss	(2,073)	(1,471)
Corporate Debt Securities
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Unrealized Loss	0	0
12 months or more, Estimated Fair Value	5,145	4,755
12 months or more, Unrealized Loss	(855)	(1,245)
Total Estimated Fair Value	5,145	4,755
Total Unrealized Loss	(855)	(1,245)
Equity Securities
Less than 12 months, Estimated Fair Value	1,994	2,932
Less than 12 months, Unrealized Loss	(6)	(68)
12 months or more, Estimated Fair Value	988	0
12 months or more, Unrealized Loss	(12)	0
Total Estimated Fair Value	2,982	2,932
Total Unrealized Loss	(18)	(68)
Obligations of states and political subdivisions
Less than 12 months, Estimated Fair Value		1,145
Less than 12 months, Unrealized Loss		(50)
12 months or more, Estimated Fair Value		0
12 months or more, Unrealized Loss		0
Total Estimated Fair Value		1,145
Total Unrealized Loss		(50)
Mortgage-backed securities
Less than 12 months, Estimated Fair Value		156,421
Less than 12 months, Unrealized Loss		(5,163)
12 months or more, Estimated Fair Value		17,296
12 months or more, Unrealized Loss		(1,011)
Total Estimated Fair Value		173,717
Total Unrealized Loss		$ (6,174)