Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Accumulated Amortization	$ (61,390)	$ (56,035)
Finite-Lived Intangible Assets, Net	22,440	27,795
Intangible Assets, Gross (Excluding Goodwill)	83,830	83,830
Indefinite-lived Intangible Assets (Excluding Goodwill)	3,639	3,556
Intangible Assets Arising from Insurance Contracts Acquired in Business Combination [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	42,788	42,788
Finite-Lived Intangible Assets, Accumulated Amortization	(42,788)	(42,788)
Finite-Lived Intangible Assets, Net	0	0
Customer Relationships
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	34,661	34,661
Finite-Lived Intangible Assets, Accumulated Amortization	(15,658)	(11,164)
Finite-Lived Intangible Assets, Net	$ 19,003	$ 23,497
Finite-Lived Intangible Assets, Remaining Amortization Period	6 years 10 months	7 years 4 months
Trade Names
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 6,381	$ 6,381
Finite-Lived Intangible Assets, Accumulated Amortization	(2,944)	(2,083)
Finite-Lived Intangible Assets, Net	$ 3,437	$ 4,298
Finite-Lived Intangible Assets, Remaining Amortization Period	4 years 4 months	5 years 2 months