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DEBT - Summary of Total Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Feb. 10, 2020	Dec. 31, 2019	Jun. 05, 2019	Mar. 05, 2014
Debt Instrument [Line Items]
Principal	$ 3,675,179		$ 1,955,764
Unamortized Debt Issuance (Costs)/Premium	25,189		(14,992)
Carrying Value	3,700,368		1,940,772
Loans payable and other borrowings
Debt Instrument [Line Items]
Principal	299,184		182,531
Unamortized Debt Issuance (Costs)/Premium	0		0
Carrying Value	299,184		182,531
Mortgage warehouse borrowings
Debt Instrument [Line Items]
Principal	154,109		123,233
Unamortized Debt Issuance (Costs)/Premium	0		0
Carrying Value	154,109		123,233
Revolving Credit Facility
Debt Instrument [Line Items]
Principal	485,000		0
Unamortized Debt Issuance (Costs)/Premium	0		0
Carrying Value	485,000		0
Senior Notes
Debt Instrument [Line Items]
Principal	2,736,886		1,650,000
Unamortized Debt Issuance (Costs)/Premium	25,189		(14,992)
Carrying Value	$ 2,762,075		1,635,008
Senior Notes \| 5.875% Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.875%
Principal	$ 350,000		350,000
Unamortized Debt Issuance (Costs)/Premium	(1,725)		(1,867)
Carrying Value	$ 348,275		348,133
Senior Notes \| 6.00% Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.00%
Principal	$ 350,000		0
Unamortized Debt Issuance (Costs)/Premium	16,242		0
Carrying Value	$ 366,242		0
Senior Notes \| 5.625% Senior Notes due 2024
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.625%				5.625%
Principal	$ 350,000		350,000
Unamortized Debt Issuance (Costs)/Premium	(2,108)		(2,244)
Carrying Value	$ 347,892		347,756
Senior Notes \| 5.875% Senior Notes due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.875%	5.875%
Principal	$ 436,886		0
Unamortized Debt Issuance (Costs)/Premium	0		0
Carrying Value	$ 436,886		0
Senior Notes \| 5.875% Senior Notes due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.875%			5.875%
Principal	$ 500,000		500,000
Unamortized Debt Issuance (Costs)/Premium	(5,614)		(5,808)
Carrying Value	$ 494,386		494,192
Senior Notes \| 6.625% Senior Notes due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.625%	6.625%
Principal	$ 300,000		0
Unamortized Debt Issuance (Costs)/Premium	23,313		0
Carrying Value	$ 323,313		0
Senior Notes \| 5.75% Senior Notes due 2028
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.75%
Principal	$ 450,000		450,000
Unamortized Debt Issuance (Costs)/Premium	(4,919)		(5,073)
Carrying Value	$ 445,081		$ 444,927