ACQUISITIONS - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Mar. 02, 2020	Dec. 31, 2019	Feb. 20, 2019
Assets acquired:
Goodwill	$ 1,189,992		$ 1,669,594
Liabilities assumed:
Lease liabilities	$ 279,854
Kleary Masonry, Inc.
Assets acquired:
Cash		$ 143
Accounts receivable		7,235
Inventories		670
Prepaid expenses and other current assets		277
Property, plant and equipment		1,042
Lease right of use assets		445
Intangible assets (trade names/customer relationships)		22,350
Goodwill		11,721
Other assets		680
Total assets acquired		44,563
Liabilities assumed:
Accounts payable		1,126
Other accrued expenses		1,005
Lease liabilities		339
Other long-term liabilities		109
Total liabilities assumed		2,579
Net assets acquired		$ 41,984
Environmental Stoneworks
Assets acquired:
Restricted cash				$ 3,379
Accounts receivable				16,825
Inventories				13,062
Prepaid expenses and other current assets				3,677
Property, plant and equipment				14,295
Lease right of use assets				11,372
Intangible assets (trade names/customer relationships)				91,170
Goodwill				63,543
Deferred taxes				474
Other assets				157
Total assets acquired				217,954
Liabilities assumed:
Accounts payable				5,910
Other accrued expenses				14,666
Lease liabilities				11,365
Other long-term liabilities				3,450
Total liabilities assumed				35,391
Net assets acquired				$ 182,563