FAIR VALUE - Fair Value Measurements for Items Measured at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Fair Value, Measurements, Recurring [Member]		Jun. 30, 2013 Fair Value, Measurements, Recurring [Member]		Jun. 30, 2014 Fair Value, Measurements, Recurring [Member] Quoted Prices in Active Markets for Identical Assets Level 1 [Member]		Jun. 30, 2013 Fair Value, Measurements, Recurring [Member] Quoted Prices in Active Markets for Identical Assets Level 1 [Member]		Jun. 30, 2014 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs Level 2 [Member]		Jun. 30, 2013 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs Level 2 [Member]		Jun. 30, 2014 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs Level 3 [Member]		Jun. 30, 2013 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs Level 3 [Member]		Jun. 30, 2014 Fair Value, Measurements, Nonrecurring [Member]		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring [Member]		Jun. 30, 2014 Fair Value, Measurements, Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets Level 1 [Member]		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets Level 1 [Member]		Jun. 30, 2014 Fair Value, Measurements, Nonrecurring [Member] Significant Other Observable Inputs Level 2 [Member]		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Significant Other Observable Inputs Level 2 [Member]		Jun. 30, 2014 Fair Value, Measurements, Nonrecurring [Member] Significant Unobservable Inputs Level 3 [Member]		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Significant Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities																			$ 518,353	[1]	$ 672,809	[1]	$ 100	[1]	$ 101	[1]	$ 518,253	[1]	$ 672,708	[1]	$ 0	[1]	$ 0	[1]
Loans available for sale																			18,129	[2]	26,029	[2]	0	[2]	0	[2]	18,129	[2]	26,029	[2]	0	[2]	0	[2]
Loans			11,678	[3]	20,691	[3]	0	[3]	0	[3]	9,035	[3]	11,048	[3]	2,643	[3]	9,643	[3]
Other real estate owned	$ 6,198	$ 6,860	$ 6,198	[4]	$ 10,063	[4]	$ 0	[4]	$ 0	[4]	$ 1,243	[4]	$ 2,022	[4]	$ 4,955	[4]	$ 8,041	[4]

[1] See Note F. Nonrecurring fair value adjustments to loans identified as impaired reflect full or partial write-downs that are based on the loan's observable market price or current appraised value of the collateral in accordance with ASC 310.

[2] Fair value is measured on a nonrecurring basis in accordance with ASC 360.

[3] See Note D for further detail of fair value of individual investment categories.

[4] Recurring fair value basis determined using observable market data.