Recently Issued Accounting Pronouncements (Details) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Average annual excess tax benefit recognized over last three years	$ 760

The average annual excess tax benefits recognized in additional paid in capital over the previous three years.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration