Summary of Significant Accounting Policies Financial Statements (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
	Mar. 07, 2014	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Policy Acquisition Cost, Amortization Expenses			$ 28,515	$ 23,400	$ 21,083
Goodwill			17,255	17,255	17,255
Statutory deposit with state insurance departments			10,000	10,200
Goodwill and Intangible Asset Impairment			0	0	0
Deferred acquisition costs			167,790	163,692	155,859	$ 145,101
Deferred Policy Acquisition Costs, Capitalized Amount			$ 32,732	$ 31,104	$ 32,071
Participating Policies Additional Income Allocated, Percent			62.20%	61.30%
Minimum [Member]
Annuity Credit Rate Associated with Amortization Method of Present Value of Future Insurance Profits			3.00%
Interest Accrual Rate Associated with Amortization Method of Present Value of Future Insurance Profits			3.00%
Maximum [Member]
Annuity Credit Rate Associated with Amortization Method of Present Value of Future Insurance Profits			5.50%
Interest Accrual Rate Associated with Amortization Method of Present Value of Future Insurance Profits			8.25%
MGLIC [Member]
Business Acquisition, Date of Acquisition Agreement	Mar. 07, 2014
Payments to Acquire Businesses, Gross	$ 5,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	12,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	6,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 5,200
Goodwill, Acquired During Period		$ 100