Acquisitions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	0 Months Ended
Dec. 31, 2013	Sep. 27, 2013 Bluemile, Inc.
Acquisitions
Initial cash consideration		$ 15.0
Consideration contingent upon achieving certain financial metrics		5.0
Merger related transaction costs		0.2
Contingent consideration liability		4.6
Purchase price consideration
Cash	15.4	15.4
Contingent consideration		4.6
Total purchase price		$ 20.0

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination.

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- Definition

The cash outflow associated with a third acquisition of a business, net of the cash acquired from the purchase.

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No definition available.

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The initial cash outflow associated with the acquisition of a business during the period.

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No definition available.

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