Intangible Assets, Net	12 Months Ended
	Dec. 31, 2021
Intangible Assets, Net [Abstract]
Intangible Assets, Net	9.INTANGIBLE ASSETS, NETThe following table provides the gross and net carrying amounts for each major class of intangible assets: As of December 31, 2021 As of December 31, 2020 Gross carrying Accumulated Net book Gross carrying Accumulated Net book amount amortization value amount amortization value (in thousands)Current contract intangibles $ 4,890,427 $ (2,749,594) $ 2,140,833 $ 4,876,880 $ (2,471,438) $ 2,405,442Network location intangibles 1,783,640 (1,121,226) 662,414 1,770,944 (1,020,236) 750,708Intangible assets, net $ 6,674,067 $ (3,870,820) $ 2,803,247 $ 6,647,824 $ (3,491,674) $ 3,156,150 All intangible assets noted above are included in the Company’s site leasing segment. Amortization expense relating to the intangible assets above was $411.9 million, $434.4 million, and $415.2 million for the years ended December 31, 2021, 2020 and 2019, respectively.‎ Estimated amortization expense on the Company’s intangibles assets is as follows: For the year ended December 31, (in thousands) 2022 $ 389,6632023 366,1312024 337,0602025 327,3522026 312,279