Goodwill and other intangible assets

Information regarding the Company’s goodwill and intangible assets as of March 31, 2020 is as follows (in thousands):



	Estimated useful life	Gross carrying amount		Accumulated amortization			Net carrying amount
Customer relationships – retailers	10 years	$	77,600	$	(42,500	)	$	35,100
Customer relationships – e-commerce	3 years	3,940		(3,901		)	39
Trademarks	10 years	3,500		(29		)	3,471
Total finite-lived intangibles		85,040		(46,430		)	38,610
Trademarks	Indefinite	63,800		—			63,800
Goodwill		171,321		—			171,321
Total goodwill and other intangibles		$	320,161	$	(46,430	)	$	273,731

Information regarding the Company’s goodwill and intangible assets as of March 31, 2019 is as follows (in thousands):



	Estimated useful life	Gross carrying amount		Accumulated amortization			Net carrying amount
Customer relationships – retailers	10 years	$	68,800	$	(35,547	)	$	33,253
Customer relationships – e-commerce	3 years	3,900		(3,900		)	—
Total finite-lived intangibles		72,700		(39,447		)	33,253
Trademarks	Indefinite	63,800		—			63,800
Goodwill		157,264		—			157,264
Total goodwill and other intangibles		$	293,764	$	(39,447	)	$	254,317

Information regarding the Company’s goodwill and intangible assets as of December 31, 2018 is as follows (in thousands):



	Estimated useful life	Gross carrying amount		Accumulated amortization			Net carrying amount
Customer relationships – retailers	10 years	$	68,800	$	(33,827	)	$	34,973
Customer relationships – e-commerce	3 years	3,900		(3,900		)	—
Total finite-lived intangibles		72,700		(37,727		)	34,973
Trademarks	Indefinite	63,800		—			63,800
Goodwill		157,264		—			157,264
Total goodwill and other intangibles		$	293,764	$	(37,727	)	$	256,037

The Company has not recognized any impairment charges on its goodwill or intangible assets, as the anticipated future cash flows generated by each of these assets remain substantially in excess of their carrying values. Amortization expense on the finite-lived intangible assets was $7.0 million, $7.1 million, $7.1 million and $1.7 million for the year ended March 31, 2020, the years ended December 31, 2018, and 2017 and the transition period for the three months ended March 31, 2019, respectively.

The estimated future amortization expense related to the finite-lived intangible assets, assuming no impairment as of March 31, 2020, is as follows (in thousands):



Year ending March 31,
2021	$	8,123
2022	8,123
2023	8,122
2024	6,963
2025	1,230
Thereafter	6,049
Total	$	38,610