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Fair value of financial instruments (Tables) | 6 Months Ended
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Jun. 30, 2017
Fair Value Disclosures [Abstract] |
Assets, Liabilities and Temporary Equity Measured at Fair Value on a Recurring Basis | The following table summarizes the Company’s assets, liabilities and temporary equity that are measured at fair value on a recurring basis as of June 30, 2017:
| Total |  | Quoted prices in active markets for identical assets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Assets |  |  |  |  |  |  |  |  |  |  |
Investments in mutual funds and common stock | $ | 53,209 |  |  | $ | 53,209 |  |  | $ | — |  |  | $ | — |
Cash surrender value of life insurance policies | $ | 62,684 |  |  | $ | — |  |  | $ | 62,684 |  |  | $ | — |
Interest rate cap agreements | $ | 1,743 |  |  | $ | — |  |  | $ | 1,743 |  |  | $ | — |
Funds on deposit with third parties | $ | 75,671 |  |  | $ | 75,671 |  |  | $ | — |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |  |  |
Contingent earn-out obligations | $ | 11,674 |  |  | $ | — |  |  | $ | — |  |  | $ | 11,674 |
Temporary equity |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interests subject to put provisions | $ | 1,009,704 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,009,704 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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