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Business combinations (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
|
3 Months Ended |
6 Months Ended |
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|
3 Months Ended |
6 Months Ended |
|
Jun. 30, 2012
|
Jun. 30, 2012
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Mar. 31, 2012
|
Dec. 31, 2011
|
Jun. 30, 2012
Act [Member]
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Jun. 30, 2011
Act [Member]
|
Jun. 30, 2012
Act [Member]
|
Jun. 30, 2011
Act [Member]
|
| Business Acquisition [Line Items] |
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|
|
|
|
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| Acquired Indefinite-lived Intangible Asset, Amount Adjustment |
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|
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$ 2,100,000 |
|
|
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| Business Acquisition, Pro Forma Revenue |
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|
|
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77,470,000 |
|
158,410,000 |
| Business Acquisition, Pro Forma Net Income (Loss) |
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|
|
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3,348,000 |
|
7,855,000 |
| Business Acquisition, Pro Forma Earnings Per Share, Basic |
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|
|
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$ 0.11 |
$ 0.26 |
| Business Acquisition, Pro Forma Earnings Per Share, Diluted |
|
|
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$ 0.11 |
$ 0.26 |
| Business Acquisition Pro Forma Weighted Average Shares Outstanding Basic |
|
|
|
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30,107 |
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30,118 |
| Business Acquisition Pro Forma Weighted Average Shares Outstanding Diluted |
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|
|
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30,211 |
|
30,252 |
| Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Liability Earnout Payments |
(13,654,000) |
(13,654,000) |
|
|
13,700,000 |
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|
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings |
(9,883,000) |
(9,952,000) |
|
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10,100,000 |
|
|
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| Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value |
$ 9,691,000 |
$ 9,691,000 |
$ 37,096,000 |
$ 40,225,000 |
$ 1,400,000 |
|
$ 1,400,000 |
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