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Basis of Presentation and Summary of Significant Accounting Policies - Pro Forma Information (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|---|
|
Jun. 30, 2011
|
Jun. 30, 2011
|
Sep. 30, 2012
acquisition
|
Dec. 31, 2011
acquisition
|
|
| Accounting Policies [Abstract] | ||||
| Number of businesses acquired | 0 | 4 | ||
| Revenue | $ 82,198 | $ 244,710 | ||
| Net loss | $ (4,484) | $ (14,185) |