CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Mar. 31, 2016 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Trade accounts receivable, allowances (in dollars) | $ 30,830 | $ 30,195 |
| Accumulated depreciation | 176,246 | 163,807 |
| Accumulated amortization | $ 49,375 | $ 45,302 |
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, authorized shares | 125,000,000 | 125,000,000 |
| Common stock, issued shares | 32,084,000 | 32,020,000 |
| Common stock, outstanding shares | 32,084,000 | 32,020,000 |