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Summary of Significant Accounting Policies (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  |  | 1 Months Ended | 0 Months Ended |  |  |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  | 0 Months Ended | 12 Months Ended |  |  |
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Dec. 31, 2009 | Dec. 31, 2012 | Dec. 31, 2010 | Mar. 31, 2011 JCG 2010 earnout target | Nov. 12, 2010 Rockford | Dec. 31, 2012 Rockford | Dec. 31, 2011 Rockford | Nov. 30, 2010 Rockford | Mar. 31, 2011 Rockford 2010 earnout target | Dec. 31, 2012 Rockford 2010 earnout target | Apr. 30, 2012 Rockford 2011 earnout target | Dec. 31, 2012 Rockford 2011 earnout target | Dec. 31, 2011 Rockford 2011 earnout target | Dec. 31, 2012 Rockford 2012 earnout target | Mar. 12, 2012 Sprint | Dec. 31, 2012 Sprint | Jun. 30, 2012 Sprint | Dec. 31, 2012 Sprint 2012 earnout target | Mar. 12, 2012 Sprint 2012 earnout target
Contingent earnout liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock issued | 81,853 |  |  | 1,095,646 | 1,605,709 |  |  |  | 494,095 | 494,095 | 232,637 | 232,637 |  |  | 62,052 | 62,052 |  |  |
Cash payment made |  | $ 86,207 | $ 39,120 |  |  |  |  |  |  |  | $ 3,450 |  |  |  | $ 19,228 |  | $ 1,969 |  |
Earnout target liability |  |  |  |  |  | $ 1,500 | $ 5,818 | $ 14,300 |  |  |  |  | $ 6,900 | $ 6,900 |  |  |  | $ 4,000 | $ 3,455

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