Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Intangible Assets

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

	March 31, 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	$	425,505	$	—	$	425,505	$	375,405	$	—	$	375,405
Other intangible assets		132,831		88,758		44,073		131,483		84,282		47,201
Total	$	558,336	$	88,758	$	469,578	$	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 March 31, 2018 (in thousands):

Remaining 2018	$	9,554
2019		8,949
2020		6,287
2021		3,644
2022		3,596
Thereafter		12,043
Total	$	44,073