STOCKHOLDERS' EQUITY (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 7,502	$ 45,259	$ 16,066
Other comprehensive income (loss) before reclassifications	3,601	(37,511)	29,951
Amounts reclassified from accumulated other comprehensive income (loss)	(992)	(246)	(758)
Net current period other comprehensive income (loss)	2,609	(37,757)	29,193
Balance, end of period	10,111	7,502	45,259
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	10,151	35,186	19,437
Other comprehensive income (loss) before reclassifications	4,892	(24,789)	16,507
Amounts reclassified from accumulated other comprehensive income (loss)	(992)	(246)	(758)
Net current period other comprehensive income (loss)	3,900	(25,035)	15,749
Balance, end of period	14,051	10,151	35,186
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(2,649)	(3,544)	(2,633)
Other comprehensive income (loss) before reclassifications	(1,291)	895	(911)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Net current period other comprehensive income (loss)	(1,291)	895	(911)
Balance, end of period	(3,940)	(2,649)	(3,544)
Deferred Tax Asset Valuation Allowance [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	0	13,617	(738)
Other comprehensive income (loss) before reclassifications	0	(13,617)	14,355
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Net current period other comprehensive income (loss)	0	(13,617)	14,355
Balance, end of period	$ 0	$ 0	$ 13,617