Valuation and Qualifying Accounts (Schedule of Valuation and Qualifying Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 2,738	$ 3,077	$ 3,215
Net Charged to Costs and Expenses	469	31	253
Translations, Reclassifications and Acquisitions	(153)	62	113
Net Write-Offs or Discounts Taken	(201)	(432)	(504)
Balance End of Year	2,853	2,738	3,077
Reserve for sales discounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	16,724	15,005	14,567
Net Charged to Costs and Expenses	79,877	76,184	65,481
Translations, Reclassifications and Acquisitions	(98)	0	(16)
Net Write-Offs or Discounts Taken	(80,504)	(74,465)	(65,027)
Balance End of Year	15,999	16,724	15,005
Reserve for inventory obsolescence
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	8,596	9,099	7,630
Net Charged to Costs and Expenses	2,938	2,586	2,998
Translations, Reclassifications and Acquisitions	(297)	(157)	79
Net Write-Offs or Discounts Taken	(3,636)	(2,932)	(1,608)
Balance End of Year	7,601	8,596	9,099
Reserve for warranty
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	4,994	5,007	5,083
Net Charged to Costs and Expenses	7,467	6,410	6,646
Translations, Reclassifications and Acquisitions	843	80	82
Net Write-Offs or Discounts Taken	(7,391)	(6,503)	(6,804)
Balance End of Year	$ 5,913	$ 4,994	$ 5,007

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

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

+ Details

Name:	us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

+ References

+ Details

Name:	us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

+ References

+ Details

Name:	us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

+ Details

Name:	us-gaap_ValuationAllowancesAndReservesDeductions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_AllowanceForDoubtfulAccountsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_InventoryValuationReserveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_ReserveForCashDiscountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_WarrantyReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: