CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Benefits and settlement expenses, reinsurance ceded	$ 284,405	$ 274,911	$ 545,805	$ 574,179
Other operating expenses, reinsurance ceded	$ 54,132	$ 51,664	$ 105,893	$ 100,890