Liability for Unpaid Claims - Reconciliation of Net Incurred and Paid Claims Development to Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Policy claims and other benefits payable:
Short-duration contracts	$ 21,869	$ 26,721
Insurance lines other than short duration—health	118,596	116,407
Insurance lines other than short duration—life	166,919	156,437
Total policy claims and other benefits payable	$ 307,384	$ 299,565