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Employee Incentive Plans Employee Incentive Plans, Vested Stock (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |
Issuance of common shares to non-employee directors | $ 0.2 | $ 0.2
Common shares withheld and canceled | 35,081 | 33,696

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- References No definition available. + Details
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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
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- Definition Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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