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Restatement of Consolidated Financial Statements - Condensed Consolidated Balance Sheets (Details 2) - $ / shares | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Mar. 25, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Treasury stock, shares |  | 1,000,000 |  |  |  |  |  |  |  |
Common Stock Class A Non-voting [Member] |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Common Stock, shares authorized | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 56,000,000 | 55,550,000 | 54,000,000 | 54,000,000 | 56,000,000 | 56,000,000
Common Stock, shares issued | 50,614,767 | 50,612,246 | 51,411,973 |  | 51,389,307 | 51,269,434 | 51,230,843 | 51,208,328 | 51,196,870 | 48,255,536
Common Stock, shares outstanding | 50,614,767 | 50,612,246 | 51,411,973 |  | 51,389,307 | 51,269,434 | 51,230,843 | 51,208,328 | 51,196,870 | 48,255,536
Common Stock Class B Voting [Member] |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Common Stock, shares authorized | 3,000,000 | 3,000,000 | 3,000,000 |  | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000
Common Stock, shares issued | 2,970,171 | 2,970,171 | 2,970,171 |  | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171
Common Stock, shares outstanding | 2,970,171 | 2,970,171 | 2,970,171 |  | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171
As Previously Reported [Member] |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Treasury stock, shares |  | 1,000,000 |  |  |  |  |  |  |  |
As Previously Reported [Member] | Common Stock Class A Non-voting [Member] |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Common Stock, shares authorized | 100,000,000 | 100,000,000 | 100,000,000 |  | 56,000,000 | 55,550,000 | 54,000,000 | 54,000,000 | 56,000,000 | 56,000,000
Common Stock, shares issued | 50,614,767 | 51,612,246 | 51,411,973 |  | 51,389,307 | 51,269,434 | 51,230,843 | 51,208,328 | 51,196,870 | 48,255,536
Common Stock, shares outstanding | 50,614,767 | 51,612,246 | 51,411,973 |  | 51,389,307 | 51,269,434 | 51,230,843 | 51,208,328 | 51,196,870 | 48,255,536
As Previously Reported [Member] | Common Stock Class B Voting [Member] |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01
Common Stock, shares authorized | 3,000,000 | 3,000,000 | 3,000,000 |  | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000 | 3,000,000
Common Stock, shares issued | 2,970,171 | 2,970,171 | 2,970,171 |  | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171
Common Stock, shares outstanding | 2,970,171 | 2,970,171 | 2,970,171 |  | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171 | 2,970,171

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