LEASE COMMITMENTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
LEASE COMMITMENTS
Rent expense under operating leases	$ 30,720	$ 26,911	$ 27,558
Assets recorded under capital leases
Buildings	15,162	14,557
Accumulated depreciation	(11,705)	(10,825)
Assets recorded under capital leases, Net	3,457	3,732
Future minimum payments under capital leases, by year and in the aggregate
2014	690
2015	887
2016	855
2017	782
2018	631
Total minimum lease payments	3,845
Amounts representing interest	(936)
Present value of future minimum lease payments	2,909
Lease amount due in one year	(524)
Total	2,385
Future minimum payments under noncancelable operating leases, by year and in the aggregate
2014	16,421
2015	12,552
2016	9,109
2017	7,514
2018	4,391
Subsequent to 2018	5,834
Total minimum lease payments	$ 55,821