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Segments And Nature Of The Business (Segment Data) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Net income | $ 219,923 | $ 205,544 | $ 98,177
Total interest income | 513 | 671 | 427
Total interest expense | 4,535 | 4,990 | 4,272
Total income tax provision | 41,686 | 34,056 | 18,740
Total identifiable assets | 1,268,317 | 975,529 | 920,026
Total additions to long-lived assets | 189,024 | 105,883 | 69,338
Total depreciation and amortization | 45,205 | 38,863 | 35,625
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | 259,532 | 237,557 | 130,944
Total interest income | 26,800 | 20,412 | 17,679
Total interest expense | 514 | 494 | 511
Total income tax provision | 78,987 | 69,697 | 49,218
Total identifiable assets | 1,170,935 | 904,979 | 839,967
Total additions to long-lived assets | 188,024 | 105,755 | 68,855
Total depreciation and amortization | 45,049 | 38,716 | 35,420
Intercompany Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total interest income | (26,287) | (19,741) | (17,252)
VITAS [Member] | Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | 155,822 | 138,846 | 57,645
Total interest income | 18,515 | 13,412 | 12,044
Total interest expense | 169 | 175 | 188
Total income tax provision | 48,711 | 40,847 | 16,436
Total identifiable assets | 663,455 | 553,949 | 545,304
Total additions to long-lived assets | 25,530 | 36,969 | 23,469
Total depreciation and amortization | 20,055 | 19,700 | 18,630
Roto-Rooter [Member] | Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | 103,710 | 98,711 | 73,299
Total interest income | 8,285 | 7,000 | 5,635
Total interest expense | 345 | 319 | 323
Total income tax provision | 30,276 | 28,850 | 32,782
Total identifiable assets | 507,480 | 351,030 | 294,663
Total additions to long-lived assets | 162,494 | 68,786 | 45,386
Total depreciation and amortization | 24,994 | 19,016 | 16,790
Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | (39,609) | (32,013) | (32,767)
Total interest expense | 4,021 | 4,496 | 3,761
Total income tax provision | (37,301) | (35,641) | (30,478)
Total identifiable assets | 97,382 | 70,550 | 80,059
Total additions to long-lived assets | 1,000 | 128 | 483
Total depreciation and amortization | $ 156 | $ 147 | $ 205
Sales Revenue [Member] | VITAS [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 66.00% | 67.00% | 69.00%
Sales Revenue [Member] | Roto-Rooter [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 34.00% | 33.00% | 31.00%

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