General (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Potentially dilutive securities (in shares)	0	28,000	0	48,000
Deferred policy acquisition cost amortization	$ 137,839	$ 139,922	$ 280,438	$ 281,482
Advertising expenses			$ 20,000	$ 24,000