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Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Allowance For Doubtful Accounts Receivable Rollforward [Line Items] |  |  |
Allowance for Doubtful Accounts, Balance at Beginning of Period | $ 578 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 577 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 794 us-gaap_AllowanceForDoubtfulAccountsReceivable
Charged to Costs and Expenses | 139 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs | 293 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs | 134 us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Write Off of Uncollectible Accounts,Net of Recoveries | (322)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries | (292)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries | (351)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Allowance for Doubtful Accounts, Balance at End of Period | $ 395 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 578 us-gaap_AllowanceForDoubtfulAccountsReceivable | $ 577 us-gaap_AllowanceForDoubtfulAccountsReceivable

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- Details
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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of recoveries of receivables doubtful of collection that were previously charged off. + References No definition available. + Details
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Period Type: | duration

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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35755819&loc=SL9156395-115594 + Details
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