FINANCING METHOD LEASE OBLIGATIONS - Property and Equipment leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	$ 5,960	$ 5,960
Less accumulated depreciation	(4,785)	(4,593)
Property and equipment held under financing method leases, net	1,175	1,367
Interest expense for financing method lease obligations	749	719
Depreciation expense attributable to assets held under financing method	192	199
Land and Land Improvements
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	843	843
Building
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	358	358
Leasehold improvements
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	11	11
Equipment
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	3,863	3,863
Leasehold Premium
Capital Leased Assets [Line Items]
Net Property And Equipment Held Under Finance Lease Obligations	$ 885	$ 885