Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2015

Other Liabilities [Abstract]

Other Noncurrent Liabilities

The following is a summary of the components of "other long-term liabilities" as presented on the Company's consolidated balance sheet. See also note 2.

	December 31,
	2015		2014
Deferred rental revenues	$	864,269	$	604,825
Deferred ground lease payable	467,411		406,732
Above market leases for land interests, net	242,893		272,694
Deferred credits, net	239,527		222,460
Asset retirement obligation (see note 14)	132,110		119,463
Deferred income tax liabilities	2,059		39,889
Other long-term liabilities	367		328
	$	1,948,636	$	1,666,391

Schedule of Above Market Leases

The estimated amortization expense related to above-market leases for land interests under the Company's towers recorded to site rental costs of operations for the years ended December 31, 2016 to 2020 is as follows:

	Years Ending December 31,
	2016		2017		2018		2019		2020
Above-market leases for land interests	$	21,302	$	20,236	$	19,458	$	18,645	$	17,569

Amortization of below-market tenant leases

The following table summarizes the estimated annual amounts related to below-market tenant leases expected to be amortized into site rental revenues for the years ended December 31, 2016 to 2020 are as follows:

	Years Ending December 31,
	2016		2017		2018		2019		2020
Below-market tenant leases	$	35,359	$	34,071	$	31,028	$	27,833	$	26,116