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DEBT - Summary of Total Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Sep. 17, 2021	Jul. 31, 2020	Feb. 10, 2020	Jun. 05, 2019	Apr. 16, 2015	Mar. 05, 2014
Debt Instrument [Line Items]
Principal	$ 3,046,062	$ 3,299,802
Unamortized Debt Issuance (Costs)/Premium	2,311	2,322
Carrying Value	3,048,373	3,302,124
Loans payable and other borrowings
Debt Instrument [Line Items]
Principal	395,400	404,386
Unamortized Debt Issuance (Costs)/Premium	0	0
Carrying Value	395,400	404,386
Mortgage warehouse borrowings
Debt Instrument [Line Items]
Principal	200,662	413,887
Unamortized Debt Issuance (Costs)/Premium	0	0
Carrying Value	200,662	413,887
Senior Notes
Debt Instrument [Line Items]
Principal	2,450,000	2,450,000
Unamortized Debt Issuance (Costs)/Premium	2,311	2,322
Carrying Value	$ 2,452,311	2,452,322
Senior Notes \| 5.875% Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.875%						5.875%
Principal	$ 350,000	350,000
Unamortized Debt Issuance (Costs)/Premium	(591)	(733)
Carrying Value	$ 349,409	349,267
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	(1,032)	(1,166)
Carrying Value	$ 348,968	348,834
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	(4,047)	(4,243)
Carrying Value	$ 495,953	495,757
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	300,000
Unamortized Debt Issuance (Costs)/Premium	16,919	17,718
Carrying Value	$ 316,919	317,718
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	(3,656)	(3,814)
Carrying Value	$ 446,344	446,186
Senior Notes \| 5.125% Senior Notes due 2030
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.125%			5.125%
Principal	$ 500,000	500,000
Unamortized Debt Issuance (Costs)/Premium	(5,282)	(5,440)
Carrying Value	494,718	494,560
Line of Credit \| Revolving Credit Facility \| $800 Million Revolving Credit Facility
Debt Instrument [Line Items]
Facility Amount	800,000
Principal	0	0
Unamortized Debt Issuance (Costs)/Premium	0	0
Carrying Value	0	0
Line of Credit \| Revolving Credit Facility \| $100 Million Revolving Credit Facility
Debt Instrument [Line Items]
Facility Amount	100,000		$ 100,000
Principal	0	31,529
Unamortized Debt Issuance (Costs)/Premium	0	0
Carrying Value	$ 0	$ 31,529