CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance	$ (24,158)	$ (16,553)	$ (17,116)
Before Reclassifications	214	(9,333)	5,791
Reclassifications	2,668	1,728	(5,228)
Other Comprehensive Income (Loss)	2,882	(7,605)	563
AOCI - Ending Balance	(21,276)	(24,158)	(16,553)
Accumulated Unrealized Gains and Losses on Available-for-Sale Securities
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance	0	0	4,136
Before Reclassifications	0	0	2,951
Reclassifications	0	0	(7,087)
Other Comprehensive Income (Loss)	0	0	(4,136)
AOCI - Ending Balance	0	0	0
Accumulated Defined Benefit Pension Items
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance	(24,158)	(16,553)	(21,252)
Before Reclassifications	214	(9,333)	2,840
Reclassifications	2,668	1,728	1,859
Other Comprehensive Income (Loss)	2,882	(7,605)	4,699
AOCI - Ending Balance	$ (21,276)	$ (24,158)	$ (16,553)