Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Dec. 31, 2018 |
|
| Segment Reporting Information [Line Items] | |||||
| Revenues | $ 363,580 | $ 357,756 | $ 699,035 | $ 687,140 | |
| Income (loss) before income taxes | 9,513 | 13,884 | 14,341 | 21,520 | |
| EBITDA, as adjusted | 26,692 | 25,839 | 47,085 | 46,003 | |
| Identifiable assets | 817,549 | 747,890 | 817,549 | 747,890 | $ 740,904 |
| Depreciation and amortization | 5,906 | 5,762 | 11,811 | 11,571 | |
| Interest | 5,573 | 2,154 | 10,622 | 4,020 | |
| Capital expenditures | 2,904 | 4,365 | 6,153 | 6,605 | |
| Non-cash compensation | 1,444 | 1,568 | 2,938 | 3,062 | |
| Corporate | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 709 | 2,240 | 1,196 | 2,721 | |
| Income (loss) before income taxes | (11,444) | (5,635) | (21,623) | (12,861) | |
| EBITDA, as adjusted | (4,136) | (3,063) | (8,313) | (8,002) | |
| Identifiable assets | 122,261 | 107,911 | 122,261 | 107,911 | |
| Depreciation and amortization | 6 | 5 | 11 | 8 | |
| Interest | 5,367 | 1,707 | 10,282 | 3,083 | |
| Capital expenditures | (301) | 24 | (88) | 24 | |
| Non-cash compensation | 1,010 | 1,026 | 2,066 | 1,977 | |
| Independent Advisory and Brokerage Services | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 301,832 | 299,471 | 584,820 | 575,000 | |
| Income (loss) before income taxes | 17,834 | 16,708 | 32,096 | 27,388 | |
| EBITDA, as adjusted | 26,776 | 25,221 | 49,574 | 45,232 | |
| Identifiable assets | 534,562 | 496,331 | 534,562 | 496,331 | |
| Depreciation and amortization | 5,308 | 5,423 | 10,617 | 10,875 | |
| Interest | 147 | 263 | 232 | 550 | |
| Capital expenditures | 3,199 | 4,160 | 6,208 | 6,257 | |
| Non-cash compensation | 255 | 309 | 514 | 619 | |
| Ladenburg | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 17,433 | 18,120 | 33,244 | 40,434 | |
| Income (loss) before income taxes | 2,112 | 1,979 | 3,333 | 6,292 | |
| EBITDA, as adjusted | 2,404 | 2,268 | 4,007 | 6,919 | |
| Identifiable assets | 61,197 | 56,592 | 61,197 | 56,592 | |
| Depreciation and amortization | 119 | 111 | 239 | 223 | |
| Interest | 2 | 13 | (11) | 48 | |
| Capital expenditures | 0 | 166 | 0 | 256 | |
| Non-cash compensation | 179 | 177 | 358 | 353 | |
| Insurance Brokerage | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 43,606 | 37,925 | 79,775 | 68,985 | |
| Income (loss) before income taxes | 1,011 | 832 | 535 | 701 | |
| EBITDA, as adjusted | 1,648 | 1,413 | 1,817 | 1,854 | |
| Identifiable assets | 99,529 | 87,056 | 99,529 | 87,056 | |
| Depreciation and amortization | 473 | 223 | 944 | 465 | |
| Interest | 57 | 171 | 119 | 339 | |
| Capital expenditures | 6 | 15 | 33 | 68 | |
| Non-cash compensation | $ 0 | $ 56 | $ 0 | $ 113 | |