COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) ft² city	Dec. 31, 2014 USD ($)
Administrative and marketing office space
Operating leased assets
Number of cities in which the company leases properties | city			20
Administrative and marketing office space | Minimum
Operating leased assets
Lease period			3 years
Administrative and marketing office space | Maximum
Operating leased assets
Lease period			10 years
Administrative and marketing office space Birmingham excluding home office
Operating leased assets
Area leased in Birmingham (in square feet) | ft²			24,090
Building contiguous to home office
Operating leased assets
Approximate price for which the company may purchase building at the end of lease term			$ 75.0
Base rate			LIBOR
Successor
Operating leased assets
Rental expense		$ 10.2
Outstanding mortgage loan commitments		$ 601.9	$ 855.3
Average rate (as a percent)		4.43%	4.17%
Successor | Administrative and marketing office space
Operating leased assets
Rental expense			$ 11.4
Aggregate annualized rent			$ 11.4
Predecessor | Administrative and marketing office space
Operating leased assets
Rental expense	$ 0.9			$ 10.8