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Basis of Financial Statement Preparation Recent accounting guidance (Details) $ in Thousands	Apr. 01, 2017 USD ($)
Accounting Standards Update 2016 09 [Member] \| Additional paid-in capital [Member]
New accounting pronouncement or change in accounting principle, cumulative effect of change on equity or net assets	$ (162)

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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