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Schedule II Valuation and qualifying accounts: | 12 Months Ended
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Dec. 31, 2012
Schedule II Valuation and qualifying accounts: |
Schedule II Valuation and qualifying accounts: | Franklin Street Properties Corp. Valuation and qualifying accounts: (in thousands)
|  |  |  | Additions |  |  |  |  |  |  |
|  |  |  | (Decreases) |  |  |  |  |  |  |
|  | Balance at |  | charged to |  |  |  |  |  | Balance |
|  | beginning |  | costs and |  |  |  |  |  | at end |
Classification |  | of year |  | expenses |  | Deductions |  | Other |  | of year |
Allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |
2010 |  | $ | 620 |  | $ | 1,175 |  | $ | (195 | ) | $ | — |  | $ | 1,600 |
2011 |  | 1,600 |  | 34 |  | (399 | ) | — |  | 1,235 |
2012 |  | 1,235 |  | 85 |  | (20 | ) | — |  | 1,300 |
Straight-line rent allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |
2010 |  | 100 |  | 600 |  | — |  | — |  | 700 |
2011 |  | 700 |  | 2 |  | (567 | ) | — |  | 135 |
2012 |  | 135 |  | 28 |  | (28 | ) | — |  | 135 |

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: 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=6881521&loc=d3e24092-122690 + Details
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