MONY CLOSED BLOCK OF BUSINESS - Schedule of Closed Block Revenues and Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Premiums and other income	$ 171,117	$ 180,097	$ 189,700
Net investment income	202,282	203,964	211,175
Net investment gains	(1,970)	910	1,524
Total revenues	371,429	384,971	402,399
Benefits and other deductions
Benefits and settlement expenses	337,352	335,200	353,488
Other operating expenses	714	1,940	2,804
Total benefits and other deductions	338,066	337,140	356,292
Net revenues before income taxes	33,363	47,831	46,107
Income tax expense	7,006	27,718	16,137
Net revenues	$ 26,357	$ 20,113	$ 29,970