Goodwill and other intangible assets

The following table displays goodwill, indefinite-lived intangible assets, and amortizable intangible assets as of September 30, 2018 and December 31, 2017 (in thousands):



	Sept. 30, 2018					Dec. 31, 2017
	Gross		Accumulated Amortization			Gross		Accumulated Amortization

Goodwill	$	2,596,863	$	—		$	2,579,417	$	—
Indefinite-lived intangibles:
Television and radio station FCC licenses	1,384,186		—			1,191,950		—
Amortizable intangible assets:
Retransmission agreements	121,594		(74,972		)	110,191		(62,355		)
Network affiliation agreements	110,390		(27,712		)	43,485		(19,371		)
Other	28,865		(8,227		)	15,763		(6,394		)
Total indefinite-lived and amortizable intangible assets	$	1,645,035	$	(110,911	)	$	1,361,389	$	(88,120	)

Our retransmission consent contracts and network affiliation agreements are amortized on a straight-line basis over their estimated useful lives. Other intangibles primarily include customer relationships and favorable lease agreements which are amortized on a straight-line basis over their useful lives.

On February 15, 2018 we acquired a business consisting of assets in San Diego: KFMB-TV (the CBS affiliated station), KFMB-D2 (the CW station), and radio stations KFMB-AM and KFMB-FM (collectively KFMB). The purchase price was $328.4 million, which included a final working capital payment of $2.5 million that we made to the sellers in the third quarter of 2018. The purchase price was paid in cash and funded through the use of available cash and borrowings under our revolving credit facility. In connection with this acquisition, we recorded indefinite lived intangible assets for FCC licenses of $192.2 million and amortizable intangible assets of $91.4 million, primarily related to retransmission consent contracts and network affiliation agreements. The amortizable assets will be amortized over a weighted average period of 10 years. We also recognized goodwill of $17.4 million as a result of the acquisition. We completed purchase accounting for the transaction in the third quarter of 2018, which resulted in an increase to our goodwill balance of $0.3 million in comparison with what we had previously disclosed.