Share Repurchases (Details Textual) - USD ($) $ in Millions |
Apr. 29, 2017 |
Apr. 30, 2016 |
Mar. 15, 2016 |
Sep. 03, 2013 |
|---|---|---|---|---|
| Previous Repurchase Plan [Member] | ||||
| Equity, Class of Treasury Stock [Line Items] | ||||
| Amount Authorized Under the Stock Repurchase Program | $ 100.0 | |||
| Remaining amount for future repurchases | $ 0.0 | |||
| New Repurchase Plan [Member] | ||||
| Equity, Class of Treasury Stock [Line Items] | ||||
| Amount Authorized Under the Stock Repurchase Program | $ 100.0 | |||
| Remaining amount for future repurchases | $ 54.4 |