Notes Payable (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument
Notes payable	$ 232,190	$ 238,716
NLIC note payable due May 2033
Debt Instrument
Notes payable	10,000	10,000
NLIC note payable due September 2033
Debt Instrument
Notes payable	10,000	10,000
ASIC note payable due April 2034
Debt Instrument
Notes payable	7,500	7,500
Insurance company note payable due March 2035
Debt Instrument
Notes payable	20,000	20,000
Federal Home Loan Bank notes
Debt Instrument
Notes payable	32,524	36,042
Insurance company line of credit due December 31, 2016
Debt Instrument
Notes payable	1,500	7,000
Ventures line of credit due August 2016
Debt Instrument
Notes payable	2,459
Senior Notes due April 2025, net
Debt Instrument
Notes payable	$ 148,207	$ 148,174