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Debt Obligations, net (Schedule of Debt) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 7 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Apr. 12, 2017 | Aug. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 3,394,374,000 |  | $ 3,394,374,000 |  | $ 3,418,357,000 |  |
Debt discounts and deferred financing costs, net | (26,261,000) |  | (26,261,000) |  | (28,449,000) |  |
Total debt obligations, net | 3,368,113,000 |  | 3,368,113,000 |  | 3,389,908,000 |  |
Interest costs capitalized | 2,000,000 | $ 1,400,000 | 4,000,000 | $ 2,800,000 |  |  |
2015 $250 Million Secured Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount | 250,000,000 |  | 250,000,000 |  |  |  |
Total debt obligations | 0 |  | $ 0 |  | 0 |  |
Converted term loan, term |  |  | 1 year |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | Minimum | Interest Rate Category One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, margin (as a percent) |  |  | 1.25% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | Minimum | Interest Rate Category Two |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, margin (as a percent) |  |  | 2.25% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | Maximum | Interest Rate Category One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, margin (as a percent) |  |  | 1.75% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | Maximum | Interest Rate Category Two |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, margin (as a percent) |  |  | 2.75% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 2.75% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 1.00% |  |  |  |
2015 $250 Million Secured Revolving Credit Facility | Federal Funds Effective Swap Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 0.50% |  |  |  |
2016 Senior Secured Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | 450,000,000.0 |  | $ 500,000,000.0
Total debt obligations | 498,750,000 |  | $ 498,750,000 |  | $ 498,648,000 |  |
Basis point spread on variable interest rate (as a percent) |  |  | 1.00% |  |  |  |
2016 Senior Secured Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 3.75% |  | 4.50% |  |
2016 Senior Secured Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 1.00% |  | 1.00% |  |
2016 Senior Secured Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 2.75% |  |  |  |
2016 Senior Secured Credit Facility | Federal Funds Effective Swap Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 0.50% |  |  |  |
Mortgages collateralized by net lease assets |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 225,624,000 |  | $ 225,624,000 |  | $ 249,987,000 |  |
Weighted average interest rate (as a percent) | 5.20% |  | 5.20% |  |  |  |
Mortgages collateralized by net lease assets | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rates (as a percent) | 3.875% |  | 3.875% |  |  |  |
Mortgages collateralized by net lease assets | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rates (as a percent) | 7.26% |  | 7.26% |  |  |  |
Mortgages collateralized by net lease assets | London Interbank Offered Rate (LIBOR) | Property One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis point spread on variable interest rate (as a percent) |  |  | 2.00% |  |  |  |
Total secured credit facilities and mortgages |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 724,374,000 |  | $ 724,374,000 |  | 748,635,000 |  |
5.85% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 0 |  | $ 0 |  | 99,722,000 |  |
Stated interest rates (as a percent) | 5.85% |  | 5.85% |  |  |  |
9.00% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 0 |  | $ 0 |  | 275,000,000 |  |
Stated interest rates (as a percent) | 9.00% |  | 9.00% |  |  | 9.00% |
4.00% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 550,000,000 |  | $ 550,000,000 |  | 550,000,000 |  |
Stated interest rates (as a percent) | 4.00% |  | 4.00% |  |  |  |
7.125% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 300,000,000 |  | $ 300,000,000 |  | 300,000,000 |  |
Stated interest rates (as a percent) | 7.125% |  | 7.125% |  |  |  |
4.875% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 300,000,000 |  | $ 300,000,000 |  | 300,000,000 |  |
Stated interest rates (as a percent) | 4.875% |  | 4.875% |  |  |  |
5.00% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 770,000,000 |  | $ 770,000,000 |  | 770,000,000 |  |
Stated interest rates (as a percent) | 5.00% |  | 5.00% |  |  |  |
6.50% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 275,000,000 |  | $ 275,000,000 |  |  |
Total debt obligations | $ 275,000,000 |  | $ 275,000,000 |  | 275,000,000 |  |
Stated interest rates (as a percent) | 6.50% | 6.50% | 6.50% | 6.50% |  |  |
6.00% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount | $ 375,000,000.0 |  | $ 375,000,000.0 |  |  |  |
Total debt obligations | $ 375,000,000 |  | $ 375,000,000 |  | 0 |  |
Stated interest rates (as a percent) | 6.00% |  | 6.00% |  |  |  |
Unsecured Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 2,570,000,000 |  | $ 2,570,000,000 |  | 2,569,722,000 |  |
Trust preferred securities |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt obligations | $ 100,000,000 |  | $ 100,000,000 |  | $ 100,000,000 |  |
Basis point spread on variable interest rate (as a percent) |  |  | 1.50% |  |  |  |

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