SIGNIFICANT TRANSACTIONS - Purchase Consideration (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	May 01, 2018
Life Business
Pro Forma [Abstract]
Revenue	$ 1,416,320
Net income	$ 112,869
P L I C O
ASSETS
Fixed maturities		$ 12,588,512
Mortgage loans		435,405
Policy loans		131,489
Total investments		13,155,406
Cash		38,456
Accrued investment income		152,030
Reinsurance receivables		272
Value of business acquired		338,303
Other assets		916
Total assets		13,685,383
LIABILITIES
Future policy benefits and claims		11,748,942
Unearned premiums		0
Total policy liabilities and accruals		11,748,942
Annuity account balances		1,823,444
Other policyholders’ funds		41,936
Other liabilities		71,061
Total liabilities		13,685,383
NET ASSETS ACQUIRED		$ 0