SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash paid for:
Interest	$ 10,381	$ 7,630	$ 5,068
Income taxes paid, net	7,488	8,843	4,712
Non-cash investing and financing transactions:
Property, equipment, and leasehold improvements accrued in accounts payable and other long-term liabilities	10,261	3,076	917
Obligation incurred in purchase transaction			29,447
Capitalized lease obligations and notes payable	7,902	176	11,200
Dividends declared but not yet paid	$ 3,142	$ 3,231	$ 1,786