Annual report pursuant to Section 13 and 15(d)

Restricted Cash - CTPL Reserve (Details)

v3.3.1.900
Restricted Cash - CTPL Reserve (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
May. 31, 2013
Restricted Cash [Line Items]      
Current restricted cash $ 274,557,000 $ 195,702,000  
Non-current restricted cash 13,650,000 544,465,000  
CTPL [Member] | CTPL Term Loan [Member]      
Restricted Cash [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 400,000,000   $ 400,000,000.0
CTPL [Member] | Payment of Liabilities [Member]      
Restricted Cash [Line Items]      
Current restricted cash 7,900,000 24,900,000  
CTPL [Member] | Construction And Interest Payments [Member]      
Restricted Cash [Line Items]      
Non-current restricted cash $ 0 $ 11,300,000