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Schedule II - Valuation and Qualifying Accounts and Reserves (Notes) | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts and Reserves |
Description |  | Balance at beginning of year |  | Additions charged to expense |  | Deductions |  | Balance at end of year
Allowance for doubtful accounts
2014 |  | $ | 13,149 |  |  | $ | 2,041 |  |  | $ | (4,448 | ) |  | $ | 10,742 |
2013 |  | $ | 20,219 |  |  | $ | 3,881 |  |  | $ | (10,951 | ) |  | $ | 13,149 |
2012 |  | $ | 25,667 |  |  | $ | 13,112 |  |  | $ | (18,560 | ) |  | $ | 20,219 |
Valuation allowance for deferred tax asset
2014 |  | $ | 122,780 |  |  | $ | 636 |  |  | $ | (6,481 | ) |  | $ | 116,935 |
2013 |  | $ | 142,176 |  |  | $ | 15,921 |  |  | $ | (35,317 | ) |  | $ | 122,780 |
2012 |  | $ | 111,438 |  |  | $ | 40,078 |  |  | $ | (9,340 | ) |  | $ | 142,176 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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