Intangibles

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Maintenance rights and lease premium, net

Maintenance rights and lease premium, net consisted of the following as of June 30, 2022 and December 31, 2021:


	June 30, 2022		December 31, 2021
Maintenance rights	$	2,815,514	$	3,292,007
Lease premium, net	962,361		1,152,513
	$	3,777,875	$	4,444,520

Movements in maintenance rights during the six months ended June 30, 2022 and 2021 were as follows:


	Six Months Ended June 30,
	2022		2021
Maintenance rights at beginning of period	$	3,292,007	$	642,825
EOL and MR contract maintenance rights expense (a)	(166,512)		(6,170)
MR contract maintenance rights write-off offset by maintenance liability release (a)	(242,142)		(7,340)
EOL contract maintenance rights write-off offset by EOL compensation received	(65,506)		(16,701)
EOL and MR contract maintenance rights write-off due to sale of aircraft	(2,333)		(2,362)


Maintenance rights at end of period	$	2,815,514	$	610,252

(a)EOL and MR contract maintenance rights expense and MR contract maintenance rights write-off offset by maintenance liability release for the six months ended June 30, 2022 included amounts related to the Ukraine Conflict. Refer to Note 5—Net charges related to Ukraine Conflict for further details.

The following tables present details of lease premium assets and related accumulated amortization as of June 30, 2022 and December 31, 2021:


	June 30, 2022
	Gross carrying amount		Accumulated amortization		Net carrying amount
Lease premium	$	1,112,471	$	(150,110)	$	962,361


	December 31, 2021
	Gross carrying amount		Accumulated amortization		Net carrying amount
Lease premium	$	1,216,541	$	(64,028)	$	1,152,513

Lease premium assets that are fully amortized are removed from the gross carrying amount and accumulated amortization columns in the tables above.

During the three and six months ended June 30, 2022, we recorded amortization expense for lease premium assets of $56.5 million and $118.3 million, respectively.

Other intangibles

Other intangibles consisted of the following as of June 30, 2022 and December 31, 2021:


	June 30, 2022		December 31, 2021
Customer relationships, net	$	187,824	$	198,412
Other intangible assets	8,414		10,467
	$	196,238	$	208,879

The following tables present details of customer relationships and related accumulated amortization as of June 30, 2022 and December 31, 2021:


	June 30, 2022
	Gross carrying amount		Accumulated amortization		Net carrying amount
Customer relationships	$	360,000	$	(172,176)	$	187,824

	December 31, 2021
	Gross carrying amount		Accumulated amortization		Net carrying amount
Customer relationships	$	360,000	$	(161,588)	$	198,412

During the three months ended June 30, 2022 and 2021, we recorded amortization expense for customer relationships of $5.3 million. During the six months ended June 30, 2022 and 2021, we recorded amortization expense for customer relationships of $10.6 million.