Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Intangible Assets

Schedule of gross carrying value, accumulated amortization, and net book value of each major class of other intangible assets

	June 30, 2018						December 31, 2017
	(in thousands)
	Gross						Gross
	Carrying		Accumulated		Net Book		Carrying		Accumulated		Net Book
	Value		Amortization		Value		Value		Amortization		Value
Indefinite-life intangible assets	$	433,005	$	—	$	433,005	$	375,405	$	—	$	375,405
Other intangible assets		135,195		92,883		42,312		131,483		84,282		47,201
Total	$	568,200	$	92,883	$	475,317	$	506,888	$	84,282	$	422,606

Schedule of expected intangible asset amortization expense

The following table presents expected intangible asset amortization expense based on existing intangible assets as of June 30, 2018 (in thousands):

Remaining 2018	$	6,092
2019		9,897
2020		6,777
2021		3,869
2022		3,635
Thereafter		12,042
Total	$	42,312