GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

GOODWILL AND INTANGIBLE ASSETS [Abstract]

Changes in Carrying Amount of Goodwill by Reportable Segment

in thousands	Aggregates	Asphalt	Concrete	Calcium	Total
Goodwill
Total as of December 31, 2015	$   3,003,191	$     91,633	$              0	$              0	$  3,094,824
Total as of December 31, 2016	$   3,003,191	$     91,633	$              0	$              0	$  3,094,824
Goodwill of acquired businesses 1	27,497	0	0	0	27,497
Total as of December 31, 2017	$   3,030,688	$     91,633	$              0	$              0	$  3,122,321

1 See Note 19 for a summary of the current year acquisitions.

Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Class

in thousands	2017	2016
Gross Carrying Amount
Contractual rights in place	$    1,050,816	$     742,085
Noncompetition agreements	7,067	6,757
Favorable lease agreements	9,479	9,479
Permitting, permitting compliance and zoning rights	119,002	112,058
Other 1	4,616	4,171
Total gross carrying amount	$    1,190,980	$     874,550
Accumulated Amortization
Contractual rights in place	$        (94,534)	$     (77,515)
Noncompetition agreements	(2,440)	(1,118)
Favorable lease agreements	(3,179)	(2,822)
Permitting, permitting compliance and zoning rights	(24,352)	(21,701)
Other 1	(2,845)	(2,342)
Total accumulated amortization	$      (127,350)	$   (105,498)
Total Intangible Assets Subject to Amortization, net	$    1,063,630	$     769,052
Intangible Assets with Indefinite Lives	0	0
Total Intangible Assets, net	$    1,063,630	$     769,052
Amortization Expense for the Year	$         23,765	$       17,565

1 Includes customer relationships and tradenames and trademarks.

Estimated Amortization Expense

in thousands
Estimated Amortization Expense for Five Subsequent Years
2018	$        26,447
2019	25,585
2020	25,375
2021	24,257
2022	23,016