SELECTED FINANCIAL STATEMENT INFORMATION, Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Accrued employee compensation and related payroll taxes	$ 67,660	$ 53,238
Deferred revenue	32,135	16,498
Accrued customer rebates and credits	11,881	8,072
Accrued additional purchase consideration	6,918	6,859
Other Liabilities, Current	17,459	15,488
Accrued expenses and other current liabilities	$ 136,053	$ 100,155