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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2015
Selected Quarterly Financial Data (Unaudited) [Abstract] |
Selected Quarterly Financial Data (Unaudited) | 18. Selected Quarterly Financial Data (Unaudited)
| 2015 Q1 | 2015 Q2 | 2015 Q3 | 2015 Q4
Net patient revenues | $ | 75,807 |  | $ | 81,451 |  | $ | 82,154 |  | $ | 84,881 |
Net revenues | $ | 77,241 |  | $ | 83,288 |  | $ | 84,049 |  | $ | 86,724 |
Operating income | $ | 9,185 |  | $ | 13,549 |  | $ | 11,949 |  | $ | 12,611 |
Net income including non-controlling interests | $ | 6,151 |  | $ | 9,117 |  | $ | 8,064 |  | $ | 8,359 |
Net income attributable to common shareholders | $ | 4,166 |  | $ | 6,304 |  | $ | 5,818 |  | $ | 5,991 |
Basic earnings per share attributable to common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Prior to revaluation of redeemable non-controlling interests, net of tax | $ | 0.34 |  | $ | 0.51 |  | $ | 0.47 |  | $ | 0.48 |
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax |  | — |  |  | (0.03 | ) |  | — |  |  | — |
| $ | 0.34 |  | $ | 0.48 |  | $ | 0.47 |  | $ | 0.48 |
Diluted earnings per share attributable to common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Prior to revaluation of redeemable non-controlling interests, net of tax | $ | 0.34 |  | $ | 0.51 |  | $ | 0.47 |  | $ | 0.48 |
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax |  | — |  |  | (0.03 | ) |  | — |  |  | — |
| $ | 0.34 |  | $ | 0.48 |  | $ | 0.47 |  | $ | 0.48 |
Shares used in computation: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | 12,313 |  |  | 12,409 |  |  | 12,421 |  |  | 12,421 |
Diluted |  | 12,313 |  |  | 12,409 |  |  | 12,421 |  |  | 12,421 |
| 2014 Q1 | 2014 Q2 | 2014 Q3 | 2014 Q4
Net patient revenues | $ | 68,397 |  | $ | 76,470 |  | $ | 76,184 |  | $ | 77,958 |
Net revenues | $ | 69,767 |  | $ | 78,201 |  | $ | 77,716 |  | $ | 79,390 |
Operating income | $ | 9,514 |  | $ | 14,221 |  | $ | 11,278 |  | $ | 10,755 |
Net income including non-controlling interests | $ | 6,323 |  | $ | 9,420 |  | $ | 7,418 |  | $ | 7,263 |
Net income attributable to common shareholders | $ | 4,228 |  | $ | 6,432 |  | $ | 5,216 |  | $ | 4,977 |
Basic earnings per share attributable to common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Prior to revaluation of redeemable non-controlling interests, net of tax | $ | 0.35 |  | $ | 0.53 |  | $ | 0.43 |  | $ | 0.41 |
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax |  | (0.08 | ) |  | (0.01 | ) |  | — |  |  | — |
| $ | 0.27 |  | $ | 0.52 |  | $ | 0.43 |  | $ | 0.41 |
Diluted earnings per share attributable to common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Prior to revaluation of redeemable non-controlling interests, net of tax | $ | 0.35 |  | $ | 0.53 |  | $ | 0.43 |  | $ | 0.41 |
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax |  | (0.08 | ) |  | (0.01 | ) |  | — |  |  | — |
| $ | 0.27 |  | $ | 0.52 |  | $ | 0.43 |  | $ | 0.41 |
Shares used in computation: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | 12,129 |  |  | 12,224 |  |  | 12,244 |  |  | 12,267 |
Diluted |  | 12,144 |  |  | 12,226 |  |  | 12,247 |  |  | 12,271 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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