SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of debt issuance costs	$ 123,003	$ 147,983
Other Noncurrent Assets | ASU 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of debt issuance costs		(148,000)
Long-term Debt | ASU 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of debt issuance costs		$ 148,000