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Identifiable intangible assets (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Software costs capitalized | $ 732,000 | $ 1,590,000 | $ 2,257,000 | $ 3,216,000 |
Amortization of capitalized software costs | 477,000 | 402,000 | 1,411,000 | 894,000 |
Amortization of identifiable intangible assets | 31,000 | 0 | 31,000 | 0 |
Components of identifiable intangible assets [Abstract] |  |  |  |  |
Intangible assets - gross | 27,894,000 |  | 27,894,000 |  | 18,440,000
Less accumulated amortization | (4,810,000) |  | (4,810,000) |  | (3,369,000)
Intangible assets - net | 23,084,000 |  | 23,084,000 |  | 15,071,000
Future amortization of intangible assets assuming straight-line amortization of capitalized software costs [Abstract] |  |  |  |  |
2014 | 782,000 |  | 782,000 |  |
2015 | 3,445,000 |  | 3,445,000 |  |
2016 | 3,414,000 |  | 3,414,000 |  |
2017 | 3,313,000 |  | 3,313,000 |  |
2018 | 3,211,000 |  | 3,211,000 |  |
Thereafter | 7,119,000 |  | 7,119,000 |  |
Total | 21,284,000 |  | 21,284,000 |  |
Acquired and internally developed software costs [Member] |  |  |  |  |
Components of identifiable intangible assets [Abstract] |  |  |  |  |
Intangible assets - gross | 26,094,000 |  | 26,094,000 |  | 16,640,000
Trademarks (non-amortizable) [Member] |  |  |  |  |
Components of identifiable intangible assets [Abstract] |  |  |  |  |
Intangible assets - gross | $ 1,800,000 |  | $ 1,800,000 |  | $ 1,800,000
Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Remaining estimated economic life of the product |  |  | 3 years |  |
Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Remaining estimated economic life of the product |  |  | 7 years |  |

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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=31042434&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=26713463&loc=d3e16323-109275 + Details
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- Definition For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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