SEGMENT REPORTING (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 3,863,955	$ 3,953,678
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	2,652,218	2,684,686
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	1,209,350	1,266,505
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 2,387	$ 2,487