Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 6,626	$ 4,173
Other comprehensive income, before tax:
Net unrealized gain (loss) on investments arising during the period	1,450	(1,660)
Other comprehensive income (loss), before tax	1,450	(1,660)
Income tax expense (benefit) related to net unrealized gain (loss) on investments arising during the period	307	(351)
Net income tax expense (benefit) on other comprehensive income (loss)	307	(351)
Other comprehensive income (loss)	1,143	(1,309)
Comprehensive Income	7,769	2,864
Comprehensive loss attributable to noncontrolling interests	0	3
Comprehensive Income Attributable to the Company	$ 7,769	$ 2,867