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Summary of Significant Accounting Policies Stock-Based Compensation (Details) (Employee Stock [Member])
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3 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
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Dec. 31, 2014
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Sep. 30, 2013
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Dec. 31, 2014
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Employee Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date | 5.00% | 15.00% | 5.00% |