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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
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Amount of the cumulative effect on retained earnings net of related income tax effect.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
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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.

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No definition available.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Summary Of Significant Accounting Policies Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands		9 Months Ended		48 Months Ended
	Jan. 01, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact to additional paid in capital and retained earnings	$ 100	$ 0
Payments related to shares withheld for employee taxes		$ 4,216	$ 4,436
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Acquisition related costs in the past several years				$ 200
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Acquisition related costs in the past several years				$ 2,400