Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 92,796
Recorded asset at beginning of period	98,500
Continuing and Discontinuing Operations
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	92,796
Underwriting costs deferred	167,546
Amortization of deferred policy acquisition costs	(161,842)
Recorded asset at beginning of period	$ 98,500