Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum

No definition available.

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- Definition

Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum

+ References

No definition available.

+ Details

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- Definition

States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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- Definition

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

+ References

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
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- Definition

The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Article 5
-Subsection 19, 20, 22

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Indebtedness Unsecured Debt (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	May. 31, 2015	Apr. 30, 2015	Oct. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Proceeds from unsecured debt				$ 0	$ 300,000	$ 750,000
Debt Instrument, Interest Rate, Stated Percentage	6.50%		5.50%
Loss on debt extinguishment				(85,713)	(283)	(9,433)
Repayments of Unsecured Debt	$ 7,100	$ 500,000	$ 152,600	913,143	2,092	$ 685,022
Debt Instrument, Interest Rate, Effective Percentage	6.08%		6.72%
Debt Instrument, Repurchased Face Amount	$ 6,300	$ 424,900	$ 150,000
Unsecured Debt				2,530,743	3,364,161
Variable Rate UnSecured Debt [Member]
Debt Instrument [Line Items]
Proceeds from unsecured debt				$ 250,000
Fixed Rate Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Estimated Trading Values, Percent of Face Value, Minimum				98.00%
Debt Instrument, Estimated Trading Values, Percent of Face Value, Maximum				124.00%
Proceeds from unsecured debt					$ 300,000
Debt Instrument, Interest Rate, Stated Percentage					3.75%
Debt Instrument, Interest Rate, Effective Percentage					3.90%
Debt Instrument, Covenant Compliance				We were in compliance with all such covenants at December 31, 2015
Fixed Rate Unsecured Debt Repaid [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				7.38%
Repayments of Unsecured Debt				$ 250,000
Debt Instrument, Interest Rate, Effective Percentage				7.50%
Tender Offer [Member]
Debt Instrument [Line Items]
Unsecured Debt				$ 500,000
Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.25%
Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.95%
Secured Debt [Member]
Debt Instrument [Line Items]
Loss on debt extinguishment				3,700
Unsecured Debt [Member]
Debt Instrument [Line Items]
Loss on debt extinguishment				$ 82,000