Long-term Debt Covenants & Guarantees (Details) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2015 USD ($) shares	Dec. 31, 2015 USD ($)
Maximum Total Leverage Ratio [Member]
Debt Instrument, Covenant Description		greater than or equal to 4.00 to 1.00
Amendment No. 1 to the Amended and Restated Senior Secured Syndicated Credit Facility Agreement [Member]
Line of Credit Facility, Covenant Compliance		the Company was in compliance with the covenants under the Credit Agreement, as amended by the Amendment
Maximum [Member] \| Maximum Total Leverage Ratio [Member]
Debt Instrument, Covenant Description		4.50 to 1.00
Maximum [Member] \| September 30, 2015 through June 31, 2016 [Member] \| Maximum Senior Secured Leverage Ratio [Member]
Debt Instrument, Covenant Description		4.50 to 1.00
Maximum [Member] \| September 30, 2016 through March 31, 2017 [Member] \| Maximum Senior Secured Leverage Ratio [Member]
Debt Instrument, Covenant Description		4.25 to 1.00
Maximum [Member] \| June 30, 2017 through September 30, 2017 [Member] \| Maximum Senior Secured Leverage Ratio [Member]
Debt Instrument, Covenant Description		4.00 to 1.00
Maximum [Member] \| December 31, 2017 through March 31, 2018 [Member] \| Maximum Senior Secured Leverage Ratio [Member]
Debt Instrument, Covenant Description		3.75 to 1.00
Maximum [Member] \| June 30, 2018 through March 31, 2020 [Member] \| Maximum Senior Secured Leverage Ratio [Member]
Debt Instrument, Covenant Description		3.50 to 1.00
Minimum [Member] \| Cash and Available Revolver Capacity [Member]
Debt Instrument, Covenant Description		150000
Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.25%
Base Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Base Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		0.00%
LIBOR Interest Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Class A Common Stock [Member]
Stock Repurchase Program, Authorized Amount \| $	$ 300.0	$ 300.0
Stock Repurchased During Period, Shares \| shares	0
Pro Forma [Member] \| Maximum [Member] \| Maximum Total Leverage Ratio [Member]
Debt Instrument, Covenant Description		4.00 to 1.00
Pro Forma [Member] \| Minimum [Member] \| Maximum Total Leverage Ratio [Member]
Debt Instrument, Covenant Description		3.00 to 1.00

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

No definition available.

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- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ 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

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

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

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

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Balance Type:	na
Period Type:	duration