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Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities (Tables) | 12 Months Ended
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Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract] |
Summary of Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities | NOTE 13· Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities The Company’s cash paid during the period for interest and income taxes are summarized as follows:
| Year Ended December 31,
(in thousands) | 2018 |  | 2017 |  | 2016
Cash paid during the period for: |  |  |  |  |
Interest | $ | 38,032 |  |  | $ | 36,172 |  |  | $ | 37,652 |
Income taxes | $ | 110,557 |  |  | $ | 152,024 |  |  | $ | 143,111 |
The Company’s significant non-cash investing and financing activities are summarized as follows:
| Year Ended December 31,
(in thousands) | 2018 |  | 2017 |  | 2016
Other payables issued for purchased customer accounts | $ | 5,462 |  |  | $ | 11,708 |  |  | $ | 10,664 |
Estimated acquisition earn-out payables and related charges | $ | 77,378 |  |  | $ | 6,921 |  |  | $ | 4,463 |
Notes payable issued or assumed for purchased customer accounts | $ | — |  |  | $ | — |  |  | $ | 492 |
Notes received on the sale of fixed assets and customer accounts | $ | 52 |  |  | $ | — |  |  | $ | 22 |
Our Restricted Cash balance is comprised of funds held in separate premium trust accounts as required by state law or, in some cases, per agreement with our carrier partners. The following is a reconciliation of cash and cash equivalents inclusive of restricted cash as of December 31, 2018, 2017 and 2016.
| Balance as of December 31,
(in thousands) | 2018 |  | 2017 |  | 2016
Table to reconcile cash and cash equivalents inclusive of restricted cash |  |  |  |  |
Cash and cash equivalents | $ | 438,961 |  |  | $ | 573,383 |  |  | 515,646 |
Restricted cash | 338,635 |  |  | 250,705 |  |  | 265,637 |
Total cash and cash equivalents inclusive of restricted cash at the end of the period | $ | 777,596 |  |  | $ | 824,088 |  |  | 781,283 |

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