Fair Value Measurements - Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Total Fair Value Inputs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	$ 1,743	$ 1,653
Company Owned Life Insurance - Deferred Compensation Assets	387	437
Large Capitalization Registered Investment Companies	64	62
Mid Capitalization Registered Investment Companies	6	6
Small Capitalization Registered Investment Companies	11	9
International Developed And Emerging Markets Registered Investment Companies	34	37
Fixed Income Registered Investment Companies	8	8
Assets, Fair Value Disclosure	2,253	2,212
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	0	0
Company Owned Life Insurance - Deferred Compensation Assets	0	0
Large Capitalization Registered Investment Companies	64	62
Mid Capitalization Registered Investment Companies	6	6
Small Capitalization Registered Investment Companies	11	9
International Developed And Emerging Markets Registered Investment Companies	34	37
Fixed Income Registered Investment Companies	8	8
Assets, Fair Value Disclosure	123	122
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	1,743	1,653
Company Owned Life Insurance - Deferred Compensation Assets	387	437
Large Capitalization Registered Investment Companies	0	0
Mid Capitalization Registered Investment Companies	0	0
Small Capitalization Registered Investment Companies	0	0
International Developed And Emerging Markets Registered Investment Companies	0	0
Fixed Income Registered Investment Companies	0	0
Assets, Fair Value Disclosure	2,130	2,090
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	0	0
Company Owned Life Insurance - Deferred Compensation Assets	0	0
Large Capitalization Registered Investment Companies	0	0
Mid Capitalization Registered Investment Companies	0	0
Small Capitalization Registered Investment Companies	0	0
International Developed And Emerging Markets Registered Investment Companies	0	0
Fixed Income Registered Investment Companies	0	0
Assets, Fair Value Disclosure	$ 0	$ 0

This element represents the fair value of mutual funds which are invested in fixed income common stock.

No definition available.

Name:	kwr_AvailableForSaleSecuritiesAssetsFixedIncomeRegisteredInvestmentCompaniesFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of mutual funds which are invested in international developed and emerging markets common stock.

+ References

No definition available.

+ Details

Name:	kwr_AvailableForSaleSecuritiesAssetsInternationalDevelopedAndEmergingMarketsRegisteredInvestmentCompaniesFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of mutual funds which are invested in large capitalization common stock.

+ References

No definition available.

+ Details

Name:	kwr_AvailableForSaleSecuritiesAssetsLargeCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of mutual funds which are invested in mid capitalization common stock.

+ References

No definition available.

+ Details

Name:	kwr_AvailableForSaleSecuritiesAssetsMidCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of mutual funds which are invested in small capitalization common stock.

+ References

No definition available.

+ Details

Name:	kwr_AvailableForSaleSecuritiesAssetsSmallCapitalizationRegisteredInvestmentCompaniesFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of company owned life insurance in deferred compensation assets.

+ References

No definition available.

+ Details

Name:	kwr_CashSurrenderValueCompanyOwnedLifeInsuranceDeferredCompensationAssetsFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value of company owned life insurance.

+ References

No definition available.

+ Details

Name:	kwr_CashSurrenderValueCompanyOwnedLifeInsuranceFairValueDisclosure
Namespace Prefix:	kwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration