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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2015
Selected Quarterly Financial Data (Unaudited) [Abstract] |
Summary of Selected Quarterly Financial Data |
| 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 Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: 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 + Details
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