Commitments and Contingencies [Line Items]

No definition available.

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- 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=64930739&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=64930785&loc=d3e28551-108399

+ Details

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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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Balance Type:	na
Period Type:	instant

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ 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 e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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

- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_LegalFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

+ Details

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

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

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-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

+ Details

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

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

+ Details

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Balance Type:	debit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Commitments and Contingencies (Details) - USD ($)			1 Months Ended		9 Months Ended
Commitments and Contingencies (Details) - USD ($)	Oct. 06, 2017	Sep. 16, 2015	May 31, 2014	Jun. 30, 2013	Sep. 30, 2017	Dec. 31, 2016
Senior Notes [Member]
Commitments and Contingencies [Line Items]
Face amount of debt instrument					$ 500,000,000	$ 500,000,000
Senior Notes [Member] \| Senior Notes Due 2024 [Member]
Commitments and Contingencies [Line Items]
Face amount of debt instrument					$ 250,000,000	250,000,000
Debt instrument, interest rate, stated percentage					4.40%
Senior Notes [Member] \| Senior Notes Due 2023 [Member]
Commitments and Contingencies [Line Items]
Face amount of debt instrument					$ 250,000,000	$ 250,000,000
Debt instrument, interest rate, stated percentage					4.25%
LCIF [Member] \| Maximum [Member]
Commitments and Contingencies [Line Items]
Debt instrument, interest rate, stated percentage					6.50%	6.50%
LCIF [Member] \| Senior Notes [Member] \| Senior Notes Due 2024 [Member]
Commitments and Contingencies [Line Items]
Face amount of debt instrument			$ 250,000,000
Debt instrument, interest rate, stated percentage			4.40%
Debt instrument, redemption price, percentage			99.883%
LCIF [Member] \| Senior Notes [Member] \| Senior Notes Due 2023 [Member]
Commitments and Contingencies [Line Items]
Face amount of debt instrument				$ 250,000,000
Debt instrument, interest rate, stated percentage				4.25%
Debt instrument, redemption price, percentage				99.026%
Bridgewater Hills Corporate Center, LLC [Member]
Commitments and Contingencies [Line Items]
Damages sought		$ 9,200,000
Estimated litigation liability					$ 2,050,000
Litigation reserve					$ 2,226,000
Bridgewater Hills Corporate Center, LLC [Member] \| Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Litigation payment	$ 2,050,000
Bridgewater Hills Corporate Center, LLC [Member] \| Maximum [Member]
Commitments and Contingencies [Line Items]
Estimate of possible loss (shall not exceed)		$ 10,000,000