Summary of Significant Accounting Policies (Intangible Assets) (Details) |
12 Months Ended |
|---|---|
Mar. 31, 2017 | |
| Minimum | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 7 years |
| Maximum | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 12 years |
| Customer relationships | Minimum | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 7 years |
| Customer relationships | Maximum | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 12 years |