Income Taxes (Details) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
Tax Year 2014 [Member]
Operating Loss Carryforwards [Line Items]
Net reduction in taxes due to the federal government	$ 17,600

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.

No definition available.

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