SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash paid for:
Interest	$ 3,243	$ 1,293
Income taxes paid, net	3,709	2,675
Non-cash investing and financing transactions:
Property, equipment, and leasehold improvements accrued in accounts payable and other long-term liabilities	1,960	925
Capitalized lease obligations incurred		196
Dividends declared but not yet paid	2,342	1,239
Obligations incurred in acquisition		$ 942