Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

The changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2014 are as follows:

(in thousands)	Learning A-Z		Voyager Sopris Learning			ExploreLearning		Total
Balance at December 31, 2013:
Goodwill, gross	$	13,215	$	217,262		$	6,947	$	237,424
Accumulated impairment loss		—		(189,582	)		—		(189,582	)
Goodwill		13,215		27,680			6,947		47,842
Impairment		—		—			—		—
Acquisitions		—		—			—		—
Balance at December 31, 2014:
Goodwill, gross		13,215		217,262			6,947		237,424
Accumulated impairment loss		—		(189,582	)		—		(189,582	)
Goodwill		13,215		27,680			6,947		47,842
Impairment		—		—			—		—
Acquisitions		—		—			—		—
Balance at December 31, 2015:
Goodwill, gross		13,215		217,262			6,947		237,424
Accumulated impairment loss		—		(189,582	)		—		(189,582	)
Goodwill	$	13,215	$	27,680		$	6,947	$	47,842

The Company’s definite lived intangible assets and related accumulated amortization at December 31, 2015 and 2014 consisted of the following:

(in thousands)	December 31, 2013			Additions			Disposals			Impairments		December 31, 2014			Additions			Disposals		Impairments		December 31, 2015
Intangible assets, gross:
Publishing rights	$	26,200		$	—		$	—		$	—	$	26,200		$	—		$	—	$	—	$	26,200
Trademark		5,690			—			(580	)		—		5,110			—			—		—		5,110
Customer relationships		7,717			—			—			—		7,717			—			—		—		7,717
Acquired curriculum and technology		24,828			—			—			—		24,828			—			—		—		24,828
Reseller network		12,300			—			—			—		12,300			—			—		—		12,300
Conference attendees		134			—			(134	)		—		—			—			—		—		—
Total intangible assets, gross		76,869			—			(714	)		—		76,155			—			—		—		76,155
Intangible assets, accumulated amortization:
Publishing rights		(21,495	)		(1,943	)		—			—		(23,438	)		(1,303	)		—		—		(24,741	)
Trademark		(2,066	)		(452	)		325			—		(2,193	)		(419	)		—		—		(2,612	)
Customer relationships		(5,779	)		(699	)		—			—		(6,478	)		(648	)		—		—		(7,126	)
Acquired curriculum and technology		(16,109	)		(3,510	)		—			—		(19,619	)		(2,478	)		—		—		(22,097	)
Reseller network		(11,616	)		(341	)		—			—		(11,957	)		(201	)		—		—		(12,158	)
Conference attendees		(129	)		(5	)		134			—		—			—			—		—		—
Total intangible assets, accumulated amortization		(57,194	)		(6,950	)		459			—		(63,685	)		(5,049	)		—		—		(68,734	)
Intangible assets, net	$	19,675		$	(6,950	)	$	(255	)	$	—	$	12,470		$	(5,049	)	$	—	$	—	$	7,421

Estimated amortization expense expected for each of the next five years related to intangibles subject to amortization is as follows: