Long-Term Debt - 2014 Revolver Loan (Details) - USD ($)
12 Months Ended
Jan. 27, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Oct. 07, 2015
Oct. 06, 2015
Nov. 03, 2014
Debt Instrument [Line Items]              
Payments of debt issuance costs   $ 14,296,000 $ 0 $ 7,496,000      
Line of Credit              
Debt Instrument [Line Items]              
Debt maximum borrowing capacity $ 90,000,000.0           $ 1,440,000,000.000
Payments of debt issuance costs $ 2,900,000            
Line of Credit | 2014 Revolver Loan              
Debt Instrument [Line Items]              
Debt maximum borrowing capacity         $ 150,000,000.0 $ 80,000,000.0 $ 80,000,000.0
Payments of debt issuance costs       $ 2,300,000      
Accumulated amortization of deferred financing costs   $ 985,000 $ 530,000        
Quarterly commitment fee percentage   0.50%          
Debt remaining borrowing capacity   $ 61,900,000          
Line of Credit | 2014 Revolver Loan | Alternate Base Rate Loan              
Debt Instrument [Line Items]              
Debt instrument, margin in addition to base rate   3.25%          
Line of Credit | 2014 Revolver Loan | Alternate Base Rate Loan | Federal Funds Effective Rate              
Debt Instrument [Line Items]              
Debt instrument, basis spread on variable rate   0.50%          
Line of Credit | 2014 Revolver Loan | Alternate Base Rate Loan | LIBOR              
Debt Instrument [Line Items]              
Debt instrument, basis spread on variable rate   1.00%          
Line of Credit | 2014 Revolver Loan | Eurodollar Loan              
Debt Instrument [Line Items]              
Debt instrument, margin in addition to base rate   4.25%          
Line of Credit | Letter of Credit              
Debt Instrument [Line Items]              
Debt remaining borrowing capacity   $ 3,100,000