Basis of Financial Statements Basis of Financial Statements (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred charges and other assets, net	$ 282,695	$ 167,417
Long-term debt, net	$ 758,453	758,148
Previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred charges and other assets, net		173,384
Long-term debt, net		$ 764,115