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ACQUISITIONS - Consideration (Details) $ in Thousands			12 Months Ended
	Aug. 02, 2019 USD ($) a	Jan. 03, 2019 USD ($) a	Dec. 31, 2019 USD ($)	Jan. 02, 2019 USD ($)	Dec. 31, 2018 USD ($)
ACQUISITIONS
Previously held investment			$ 307,322
Equity method investments			28,529		$ 161,309
Acquisition gain			$ 177,043
AllDale I and II
ACQUISITIONS
Royalty acres, net | a		43,000
Cash		$ 176,205
Previously held investment		307,322
Total		483,527
Equity method investments				$ 130,300
Acquisition gain		$ 177,000
Wing
ACQUISITIONS
Royalty acres, net | a	9,000
Royalty acres, gross | a	400,000
Cash	$ 144,900

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- Definition

The number of gross royalty acres acquired.

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