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Debt Instrument, Increase of Weighted Average Debt Maturity

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Debt Instrument, Margin

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Debt Instrument, Unamortized Discount (Premium) and Deferred Financing Costs, Net

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- Definition

Debt Instrument, Weighted Average Debt Maturity

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Weighted average interest rate of debt outstanding.

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Amount of interest capitalized during the period.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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Debt Obligations, net (Schedule of Debt) (Details) - USD ($)	1 Months Ended			3 Months Ended		7 Months Ended	9 Months Ended
	Oct. 31, 2017	Sep. 30, 2017	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Nov. 02, 2017	Apr. 12, 2017	Mar. 31, 2017	Aug. 31, 2016	Jun. 30, 2016	Mar. 31, 2016
Debt Disclosure [Abstract]
Increase of weighted average debt maturity		1 year 6 months
Weighted average debt maturity		4 years
Debt Instrument [Line Items]
Total debt obligations		$ 4,343,182,000		$ 4,343,182,000		$ 3,418,357,000	$ 4,343,182,000
Debt discounts and deferred financing costs, net		(64,228,000)		(64,228,000)		(28,449,000)	(64,228,000)
Total debt obligations, net		4,278,954,000		4,278,954,000		3,389,908,000	4,278,954,000
Interest costs capitalized				2,100,000	$ 1,400,000		6,100,000	$ 4,200,000
2015 $325 Million Secured Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, face amount		325,000,000		325,000,000			325,000,000
Total debt obligations		0		0		0	$ 0
Converted term loan, term							1 year
2015 $325 Million Secured Revolving Credit Facility \| Minimum \| Interest Rate Category One
Debt Instrument [Line Items]
Debt instrument, margin (as a percent)							1.25%
2015 $325 Million Secured Revolving Credit Facility \| Minimum \| Interest Rate Category Two
Debt Instrument [Line Items]
Debt instrument, margin (as a percent)							2.25%
2015 $325 Million Secured Revolving Credit Facility \| Maximum \| Interest Rate Category One
Debt Instrument [Line Items]
Debt instrument, margin (as a percent)							1.75%
2015 $325 Million Secured Revolving Credit Facility \| Maximum \| Interest Rate Category Two
Debt Instrument [Line Items]
Debt instrument, margin (as a percent)							2.75%
2015 $325 Million Secured Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis point spread on variable interest rate (as a percent)							2.50%
2015 $325 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 $325 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		400,000,000.0		400,000,000.0			$ 400,000,000.0					$ 500,000,000.0	$ 450,000,000.0
Total debt obligations		$ 400,000,000		400,000,000		$ 498,648,000	$ 400,000,000
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)		3.00%	3.75%			4.50%	3.00%
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)		0.75%	1.00%			1.00%	0.75%
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)							2.00%
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		$ 223,182,000		$ 223,182,000		$ 249,987,000	$ 223,182,000
Weighted average interest rate (as a percent)		5.20%		5.20%			5.20%
Mortgages collateralized by net lease assets \| Minimum
Debt Instrument [Line Items]
Stated interest rates (as a percent)		4.851%		4.851%			4.851%
Mortgages collateralized by net lease assets \| Maximum
Debt Instrument [Line Items]
Stated interest rates (as a percent)		7.26%		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		$ 623,182,000		$ 623,182,000		748,635,000	$ 623,182,000
5.85% senior notes
Debt Instrument [Line Items]
Total debt obligations		$ 0		$ 0		99,722,000	$ 0
Stated interest rates (as a percent)		5.85%		5.85%			5.85%				5.85%
9.00% senior notes
Debt Instrument [Line Items]
Total debt obligations		$ 0		$ 0		275,000,000	$ 0
Stated interest rates (as a percent)		9.00%		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	$ 550,000,000
Stated interest rates (as a percent)		4.00%		4.00%			4.00%
7.125% senior notes
Debt Instrument [Line Items]
Total debt obligations		$ 300,000,000		$ 300,000,000		300,000,000	$ 300,000,000
Stated interest rates (as a percent)		7.125%		7.125%			7.125%
4.875% senior notes
Debt Instrument [Line Items]
Total debt obligations		$ 300,000,000		$ 300,000,000		300,000,000	$ 300,000,000
Stated interest rates (as a percent)		4.875%		4.875%			4.875%
5.00% senior notes
Debt Instrument [Line Items]
Total debt obligations		$ 770,000,000		$ 770,000,000		770,000,000	$ 770,000,000
Stated interest rates (as a percent)		5.00%		5.00%			5.00%
6.50% senior notes
Debt Instrument [Line Items]
Debt instrument, face amount														$ 275,000,000
Total debt obligations		$ 275,000,000		$ 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
Total debt obligations		$ 375,000,000		$ 375,000,000		0	$ 375,000,000
Stated interest rates (as a percent)		6.00%		6.00%			6.00%				6.00%
4.625% senior notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400,000,000.0		$ 400,000,000.0			$ 400,000,000.0
Total debt obligations		$ 400,000,000		$ 400,000,000		0	$ 400,000,000
Stated interest rates (as a percent)		4.625%		4.625%			4.625%
5.25% senior notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400,000,000.0		$ 400,000,000.0			$ 400,000,000.0
Total debt obligations		$ 400,000,000		$ 400,000,000		0	$ 400,000,000
Stated interest rates (as a percent)		5.25%		5.25%			5.25%
3.125% senior convertible notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 250,000,000.0		$ 250,000,000.0			$ 250,000,000.0
Total debt obligations		$ 250,000,000		$ 250,000,000		0	$ 250,000,000
Stated interest rates (as a percent)		3.125%		3.125%			3.125%
Convertible debt, conversion ratio (in shares per par value)							64.36
Convertible debt, conversion price (in dollars per share)		$ 15.54		$ 15.54			$ 15.54
Liability component of convertible debt		$ 221,800,000		$ 221,800,000			$ 221,800,000
Carrying value of equity component of convertible debt		22,500,000		22,500,000			22,500,000
Unsecured Notes
Debt Instrument [Line Items]
Total debt obligations		3,620,000,000		3,620,000,000		2,569,722,000	3,620,000,000
Trust preferred securities
Debt Instrument [Line Items]
Total debt obligations		$ 100,000,000		$ 100,000,000		$ 100,000,000	$ 100,000,000
Basis point spread on variable interest rate (as a percent)							1.50%
Subsequent Event \| 4.00% senior notes
Debt Instrument [Line Items]
Make whole premium for early extinguishment of debt	$ 5,250,000
Subsequent Event \| 7.125% senior notes
Debt Instrument [Line Items]
Make whole premium for early extinguishment of debt	$ 3,660,000
Subsequent Event \| 3.125% senior convertible notes
Debt Instrument [Line Items]
Debt instrument, face amount									$ 37,500,000