Segment Information - Segment Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2016 |
|
| Segment Reporting Information [Line Items] | |||||
| Revenues | $ 322,309 | $ 274,323 | $ 924,136 | $ 809,894 | |
| Income (loss) before income taxes | 4,657 | (6,911) | 1,326 | (14,872) | |
| EBITDA, as adjusted | 16,662 | 5,564 | 37,309 | 21,149 | |
| Identifiable assets | 552,615 | 543,756 | 552,615 | 543,756 | $ 546,003 |
| Depreciation and amortization | 7,104 | 7,014 | 21,830 | 21,130 | |
| Interest | 601 | 1,133 | 1,599 | 3,512 | |
| Capital expenditures | 2,552 | 1,298 | 7,258 | 4,998 | |
| Non-cash compensation | 1,341 | 1,300 | 4,148 | 3,996 | |
| Corporate | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 327 | 174 | 942 | 586 | |
| Income (loss) before income taxes | (5,864) | (3,948) | (15,383) | (11,129) | |
| EBITDA, as adjusted | (4,738) | (2,797) | (11,954) | (7,505) | |
| Identifiable assets | 37,544 | 44,832 | 37,544 | 44,832 | |
| Depreciation and amortization | 1 | 17 | 30 | 51 | |
| Interest | 77 | 164 | 223 | 552 | |
| Capital expenditures | (40) | 0 | 4 | 0 | |
| Non-cash compensation | 916 | 851 | 2,777 | 2,651 | |
| Independent Advisory and Brokerage Services | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 286,170 | 251,045 | 832,866 | 738,429 | |
| Income (loss) before income taxes | 8,411 | 607 | 17,409 | 7,291 | |
| EBITDA, as adjusted | 16,956 | 9,503 | 42,413 | 32,222 | |
| Identifiable assets | 424,155 | 411,577 | 424,155 | 411,577 | |
| Depreciation and amortization | 5,340 | 5,008 | 16,140 | 15,173 | |
| Interest | 352 | 795 | 865 | 2,446 | |
| Capital expenditures | 2,208 | 1,267 | 6,460 | 4,661 | |
| Non-cash compensation | 263 | 253 | 772 | 756 | |
| Ladenburg | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 19,454 | 10,424 | 49,330 | 33,457 | |
| Income (loss) before income taxes | 3,099 | (1,959) | 4,408 | (6,071) | |
| EBITDA, as adjusted | 3,479 | (1,604) | 5,811 | (4,862) | |
| Identifiable assets | 44,759 | 33,046 | 44,759 | 33,046 | |
| Depreciation and amortization | 105 | 185 | 392 | 546 | |
| Interest | 0 | 4 | 0 | 4 | |
| Capital expenditures | 351 | 19 | 627 | 139 | |
| Non-cash compensation | 157 | 135 | 472 | 406 | |
| Insurance Brokerage | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 16,358 | 12,680 | 40,998 | 37,422 | |
| Income (loss) before income taxes | (989) | (1,611) | (5,108) | (4,963) | |
| EBITDA, as adjusted | 965 | 462 | 1,039 | 1,294 | |
| Identifiable assets | 46,157 | 54,301 | 46,157 | 54,301 | |
| Depreciation and amortization | 1,658 | 1,804 | 5,268 | 5,360 | |
| Interest | 172 | 170 | 511 | 510 | |
| Capital expenditures | 33 | 12 | 167 | 198 | |
| Non-cash compensation | $ 5 | $ 61 | $ 127 | $ 183 | |