XML 48 R39.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Inventories - Impairment allowance roll forward (Details) - Inventory Valuation Reserve - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Movement In Valuation Allowances And Reserves1 [Roll Forward] |  |
Beginning Balance | $ 1,717 | $ 4,436
Currency translation | (48) | 375
Addition | 1,276 | 2,826
Utilization | (342) | (1,920)
Release | (530) | (737)
Ending Balance | $ 2,073 | $ 4,980

X
- Definition Movement In Valuation Allowances And Reserves1 [Roll Forward] + References No definition available. + Details
Name: | oec_MovementInValuationAllowancesAndReserves1RollForward
Namespace Prefix: | oec_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Additions For Adjustments + References No definition available. + Details
Name: | oec_ValuationAllowancesAndReservesAdditionsForAdjustments
Namespace Prefix: | oec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Balance1 + References No definition available. + Details
Name: | oec_ValuationAllowancesAndReservesBalance1
Namespace Prefix: | oec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Valuation Allowances And Reserves, Charged to Cost And Expense + References No definition available. + Details
Name: | oec_ValuationAllowancesAndReservesChargedtoCostAndExpense
Namespace Prefix: | oec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Deductions, Released + References No definition available. + Details
Name: | oec_ValuationAllowancesAndReservesDeductionsReleased
Namespace Prefix: | oec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Valuation Allowances And Reserves, Deductions, Utilisation + References No definition available. + Details
Name: | oec_ValuationAllowancesAndReservesDeductionsUtilisation
Namespace Prefix: | oec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | oec_ValuationAllowancesAndReservesType1Axis=oec_InventoryValuationReserve1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |