OPERATING SEGMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenue, Property and Equipment and Intangible Assets Outside of the United States
Total revenue	$ 53,354	$ 42,899
Total long- lived assets	151,606		151,691
United States
Revenue, Property and Equipment and Intangible Assets Outside of the United States
Total revenue	37,270	31,398
Total long- lived assets	88,803		86,175
Canada
Revenue, Property and Equipment and Intangible Assets Outside of the United States
Total revenue	16,084	11,501
Total long- lived assets	$ 62,803		$ 65,516