Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 152,459	$ 152,459	$ 46,454
Intangibles, net	76,850	101,626
Indefinite lived intangible, insurance licenses	1,300	1,300
Amortization of intangible assets	$ 24,800	$ 6,200
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets useful lives	1 year
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets useful lives	15 years