Business Combinations (Fair Value of Intangible Assets Acquired) (Details) - Ozark National Life Insurance Company - USD ($) $ in Thousands		6 Months Ended
	Jan. 31, 2019	Jun. 30, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 9,600
Trademarks / trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 2,800
Weighted-Average Amortization Period	15 years	15 years
Internally developed software
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 3,800
Weighted-Average Amortization Period	7 years	7 years
Insurance licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets acquired	$ 3,000