Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Goldman Term Loan (Details)

v3.6.0.2
Long-Term Debt - Goldman Term Loan (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jul. 30, 2013
Apr. 18, 2013
Debt Instrument [Line Items]          
Payments of debt extinguishment costs $ 0 $ 0 $ 26,214,000    
Goldman Term Loan [Member] | Secured Debt [Member]          
Debt Instrument [Line Items]          
Aggregate principal amount         $ 125,000,000
7.50 % Senior Notes [Member]          
Debt Instrument [Line Items]          
Aggregate principal amount       $ 225,000,000