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Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Dec. 31, 2013
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 9.0		$ 1.3
Loss Contingency Accrual, Provision	$ 8.0	2.9	$ 7.4
Loss Contingency Accrual, Provision Adjustment	0.0	7.8	(0.8)
Loss Contingency Accrual, Payments	(19.9)	(0.7)	(3.6)
Loss Contingency Accrual	7.3	19.2	$ 9.2		$ 6.2
Loan subject to loss-sharing arrangements, aggregate unpaid principal amount	5,800.0
Loan loss accrual	12.2	$ 11.2
Level of risk retained by our captive insurance company (per claim)	$ 2.5

X

- Definition

The per claim amount needed to reflect the estimated ultimate cost of settling claims relating to casualty insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date.

+ References

No definition available.

+ Details

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X

- Definition

Loan loss accrual

+ References

No definition available.

+ Details

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X

- Definition

Loan subject to loss-sharing arrangements, aggregate unpaid principal amount

+ References

No definition available.

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X

- Definition

Loss Contingency Accrual, Provision Adjustment

+ References

No definition available.

+ 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.

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X

- Definition

Amount of loss contingency liability.

+ 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=25496072&loc=d3e14326-108349

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- Definition

Amount of cash outflow reducing loss contingency liability.

+ 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=25496072&loc=d3e14326-108349

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- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ 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=25496072&loc=d3e14326-108349

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- Definition

Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12053-110248

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