Reinsurance and Catastrophes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effects of reinsurance on premiums and benefits
Premiums written and contract deposits, Gross Amount	$ 1,277,066	$ 1,191,123	$ 1,120,852
Premiums written and contract deposits, Ceded to Other Companies	24,737	27,144	30,115
Premiums written and contract deposits, Assumed from Other Companies	4,184	3,676	3,456
Premiums written and contract deposits, Net Amount	1,256,513	1,167,655	1,094,193
Premiums and contract charges earned, Gross Amount	752,798	739,281	717,494
Premiums and contract charges earned, Ceded to Other Companies	25,077	27,276	29,990
Premiums and contract charges earned, Assumed from Other Companies	4,159	3,755	3,434
Premiums and contract charges earned, Net Amount	731,880	715,760	690,938
Benefits, claims and settlement expenses, Gross Amount	508,904	504,550	455,298
Benefits, claims and settlement expenses, Ceded to Other Companies	16,221	39,236	10,018
Benefits, claims and settlement expenses, Assumed from Other Companies	3,681	3,112	3,037
Benefits, claims and settlement expenses, Net Amount	$ 496,364	$ 468,426	$ 448,317