Income taxes - Schedule of Net Deferred Tax Position (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Sep. 30, 2019 |
|---|---|---|
| Income Tax Disclosure [Abstract] | ||
| Balance of tax jurisdictions with net deferred tax assets | $ 1,915 | $ 186 |
| Balance of tax jurisdictions with net deferred tax liabilities | (24,737) | (46,560) |
| Net deferred tax liabilities | $ (22,822) | $ (46,374) |
| X | ||||||||||
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|