SEGMENT REPORTING (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 3,932,443	$ 3,953,678
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	2,695,931	2,684,686
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	1,233,547	1,266,505
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 2,965	$ 2,487