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Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Intangible assets |  |  |  |  |
Amortization expense of intangible assets | $ 1,891 | $ 1,447 | $ 3,685 | $ 3,193 |
Estimated future amortization expense for intangible assets |  |  |  |  |
2013 (remaining six months) | 3,655 |  | 3,655 |  |
2014 | 7,489 |  | 7,489 |  |
2015 | 7,220 |  | 7,220 |  |
2016 | 6,274 |  | 6,274 |  |
2017 | 5,909 |  | 5,909 |  |
Thereafter | 19,346 |  | 19,346 |  |
Total | 49,893 |  | 49,893 |  | 51,978
Tradename |  |  |  |  |
Estimated future amortization expense for intangible assets |  |  |  |  |
Total | 22,593 |  | 22,593 |  | 23,586
Tradename | Minimum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 3 years |  |
Tradename | Maximum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 10 years |  |
Non-compete agreements |  |  |  |  |
Estimated future amortization expense for intangible assets |  |  |  |  |
Total | 3,407 |  | 3,407 |  | 4,130
Non-compete agreements | Minimum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 2 years |  |
Non-compete agreements | Maximum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 5 years |  |
Customer relationship |  |  |  |  |
Estimated future amortization expense for intangible assets |  |  |  |  |
Total | 23,893 |  | 23,893 |  | 24,212
Customer relationship | Minimum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 5 years |  |
Customer relationship | Maximum |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 15 years |  |
Backlog |  |  |  |  |
Intangible assets |  |  |  |  |
Amortization Period |  |  | 9 months |  |
Estimated future amortization expense for intangible assets |  |  |  |  |
Total |  |  |  |  | $ 50

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References No definition available. + Details
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- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 42, 45 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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