Executive Stock Purchase Plan (Details Textual) - shares shares in Thousands	Dec. 31, 2016	Jun. 16, 2014
Executive Stock Purchase Plan [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Number Of Shares Authorized To Be Repurchased	13	250

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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