| Component: (Network and Table) | |
|---|---|
| Network | 177 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Balance of Total Amounts of Gross Unrecognized Tax Benefits (Detail) (http://www.schange.com/taxonomy/role/DisclosureIncomeTaxesReconciliationOfBeginningAndEndingBalanceOfTotalAmountsOfGrossUnrecognizedTaxBenefits) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001019671 (http://www.sec.gov/CIK) |
| Income Tax Disclosure [Abstract] | Period [Axis] | |
|---|---|---|
2015-02-01 - 2016-01-31 | 2014-02-01 - 2015-01-31 | |
Income Tax Disclosure [Abstract] | ||
Balance of gross unrecognized tax benefits, beginning of period | 5,527,000 | 6,035,000 |
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period | ||
Decrease due to expiration of statute of limitation | (325,000) | (275,000) |
Effect of currency translation | (51,000) | (329,000) |
Balance of gross unrecognized tax benefits, end of period | 5,151,000 | 5,527,000 |