Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivative Instruments (Derivative Financial Instruments) (Details)

v3.5.0.2
Fair Value Measurements and Derivative Instruments (Derivative Financial Instruments) (Details) - USD ($)
 9 Months Ended
Feb. 02, 2015
Sep. 30, 2016
Sep. 30, 2015
Stock Appreciation Rights (SARs) [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Stock appreciation rights, expiration period 8 years    
Volatility   40.00%  
Risk-free interest rate   1.30%  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Fair value of stock appreciation rights, beginning balance   $ 32,820,000 $ 0
Issuance     21,660,000
Fair value of stock appreciation rights, ending balance   16,980,000 26,700,000
Stock Appreciation Rights (SARs) [Member] | Other Income (Expense) [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Fair value adjustment at end of period, included in Other Income (Expense)   $ (15,840,000) $ 5,040,000
Stock Appreciation Rights (SARs) [Member] | Minimum [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Contractual term (in years)   2 years 4 months  
Stock Appreciation Rights (SARs) [Member] | Maximum [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Contractual term (in years)   6 years 3 months  
Stock Appreciation Rights (SARs) [Member] | Common Stock - Class A [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Stock appreciation rights (in rights) 3,000,000    
Exercise price of stock appreciation rights (per share) $ 13.00    
Searchlight ALX, LP Promissory Note [Member] | Unsecured Debt [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Debt face amount $ 75,000,000.0