LEASE COMMITMENTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
LEASE COMMITMENTS
Rent expense under operating leases	$ 26,911	$ 27,558	$ 23,382
Assets recorded under capital leases
Buildings	14,557	16,861
Accumulated depreciation	(10,825)	(10,255)
Assets recorded under capital leases, Net	3,732	6,606
Future minimum payments under capital leases, by year and in the aggregate
2013	588
2014	676
2015	666
2016	676
2017	541
Subsequent to 2017	1,105
Total minimum lease payments	4,252
Amounts representing interest	(1,314)
Present value of future minimum lease payments	2,938
Lease amount due in one year	(420)
Total	2,518
Future minimum payments under noncancelable operating leases, by year and in the aggregate
2013	15,522
2014	12,061
2015	9,599
2016	7,559
2017	5,278
Subsequent to 2017	21,544
Total minimum lease payments	$ 71,563

Present value of minimum lease payments for capital leases.

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