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Recent Accounting Pronouncements (Narrative) (Details) $ in Millions | 1 Months Ended
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Jan. 31, 2017 USD ($)
Accounting Standards Update 2016-09 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred tax assets, gross | $ 0.3
Deferred tax assets, valuation allowance | 0.3
Reclassification of excess tax benefits between financing and operating cash flows | Three months ended March 31, 2016 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Prior period reclassification adjustment | 4.4
Additional paid-in capital | Accounting Standards Update 2016-09 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Cumulative effect of new accounting principle in period of adoption | (0.2)
Retained earnings | Accounting Standards Update 2016-09 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Cumulative effect of new accounting principle in period of adoption | $ 0.2

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