Repurchase of Common Stock (Details Textual) - shares	Jun. 30, 2017	Dec. 31, 2008
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		1,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	72,000

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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