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Subsequent Event	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	21. Subsequent Event In February 2018, we gave the notice required under the indenture governing our 5.00% senior notes of our intent to redeem such notes in full on March 15, 2018. In connection with this early redemption, we will incur charges of $28.0 million, including a premium of $20.0 million and the write-off of $8.0 million of unamortized deferred financing costs. We intend to fund this redemption with $550.0 million of borrowings from our tranche A term loan facility and borrowings from our revolving credit facility under the 2017 Credit Agreement as well as with cash on hand.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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