Debt instrument repayment date.

No definition available.

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- Definition

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 8
-Article 9

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ 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

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ 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)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: 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)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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- Details

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- Details

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- Details

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Debt (Secured Tower Revenue Securities) (Narrative) (Details) - USD ($)								1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 15, 2016	Jul. 07, 2016	Oct. 14, 2015	Oct. 15, 2014	Apr. 18, 2013	Aug. 09, 2012	Apr. 16, 2010	Aug. 08, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Deferred financing fees, expensed									$ 5,325,000	$ 4,626,000	$ 10,590,000	$ 9,170,000
Aggregate debt									8,482,803,000		$ 8,482,803,000		$ 8,452,070,000
2010-2C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount							$ 550,000,000
Debt instrument, interest rate, stated percentage							5.101%
Repayment date of debt instrument							Apr. 11, 2017
Debt instrument, maturity date							Apr. 09, 2042				Apr. 11, 2017
Deferred financing fees							$ 8,100,000
Aggregate debt									548,923,000		$ 548,923,000		548,268,000
2012-1C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount						$ 610,000,000
Debt instrument, interest rate, stated percentage						2.933%
Repayment date of debt instrument						Dec. 11, 2017
Debt instrument, maturity date						Dec. 09, 2042					Dec. 11, 2017
Deferred financing fees, expensed						$ 14,900,000
Aggregate debt									605,681,000		$ 605,681,000		604,229,000
2013 Tower Securities [Member]
Debt Instrument [Line Items]
Deferred financing fees, expensed					$ 25,500,000
Debt instrument, weighted average interest rate					3.218%
Aggregate debt					$ 1,330,000,000
2013-1C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 425,000,000
Debt instrument, interest rate, stated percentage					2.24%
Repayment date of debt instrument					Apr. 10, 2018
Debt instrument, maturity date					Apr. 09, 2043						Apr. 10, 2018
Aggregate debt									421,928,000		$ 421,928,000		421,099,000
2013-2C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 575,000,000
Debt instrument, interest rate, stated percentage					3.722%
Repayment date of debt instrument					Apr. 11, 2023
Debt instrument, maturity date					Apr. 09, 2048						Apr. 11, 2023
Aggregate debt									567,029,000		$ 567,029,000		566,523,000
2013-1D Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 330,000,000
Debt instrument, interest rate, stated percentage					3.598%
Repayment date of debt instrument					Apr. 10, 2018
Debt instrument, maturity date					Apr. 09, 2043						Apr. 10, 2018
Aggregate debt									327,565,000		$ 327,565,000		326,918,000
2014 Tower Securities [Member]
Debt Instrument [Line Items]
Deferred financing fees, expensed				$ 22,500,000
Debt instrument, weighted average interest rate				3.289%
Aggregate debt				$ 1,540,000,000
2014-1C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 920,000,000
Debt instrument, interest rate, stated percentage				2.898%
Repayment date of debt instrument				Oct. 08, 2019
Debt instrument, maturity date				Oct. 11, 2044							Oct. 08, 2019
Aggregate debt									910,896,000		$ 910,896,000		909,595,000
2014-2C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 620,000,000
Debt instrument, interest rate, stated percentage				3.869%
Repayment date of debt instrument				Oct. 08, 2024
Debt instrument, maturity date				Oct. 08, 2049							Oct. 08, 2024
Aggregate debt									612,243,000		$ 612,243,000		611,853,000
2015-1C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 500,000,000
Debt instrument, interest rate, stated percentage			3.156%
Repayment date of debt instrument			Oct. 08, 2020
Debt instrument, maturity date			Oct. 10, 2045								Oct. 08, 2020
Deferred financing fees, expensed			$ 10,900,000
Aggregate debt									$ 490,238,000		$ 490,238,000		$ 489,496,000
2016-1C Tower Securities [Member]
Debt Instrument [Line Items]
Deferred financing fees, expensed								$ 9,200,000
Subsequent Event [Member] \| 2010 Tower Securities [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	$ 550,000,000
Subsequent Event [Member] \| 2016-1C Tower Securities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 700,000,000
Debt instrument, interest rate, stated percentage		2.877%
Repayment date of debt instrument		Jul. 01, 2021
Debt instrument, maturity date		Jul. 01, 2046