Goodwill and Intangible Assets

The change in goodwill from December 31, 2018 to September 30, 2019, consisted of the following (in thousands):



	Carrying Value
Balance at December 31, 2018	$	484,941
Goodwill acquired	5,019
Purchase price allocation adjustments from prior periods	(403		)
Impact of foreign currency exchange rates	758
Balance at September 30, 2019	$	490,315

Identifiable intangible assets that are separable and have determinable useful lives are valued separately and amortized over their benefit period. The following is the gross carrying value and accumulated amortization of the Company’s identifiable intangible assets as of September 30, 2019 and December 31, 2018 (in thousands):



	September 30, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Tradenames	$	15,980	$	(12,778	)	$	3,202	$	15,980	$	(10,423	)	$	5,557
Customer relationships	259,756		(145,064		)	114,692		250,498		(112,757		)	137,741
Other intangible assets	—		—			—		3,489		(911		)	2,578
	$	275,736	$	(157,842	)	$	117,894	$	269,967	$	(124,091	)	$	145,876

On January 1, 2019, the Company reclassified certain other intangible assets related to real estate leases to right-of-use assets in accordance with the applicable transition guidance in ASC 840, the predecessor to Topic 842.

The weighted average amortization period of these intangible assets in the aggregate is 3.7 years.