7.	Intangibles

Intangible assets other than goodwill were comprised of the following:

	December 31,
	2016			2015
Customer relationships	$	1,568,161		$	1,575,865
Trade names		190,761			170,883
Provider network and practice management tools		187,318			183,724
Noncompetition and other agreements		512,505			510,521
Lease agreements		7,624			7,306
Indefinite-lived assets		1,546			9,310
Other		583			408
		2,468,498			2,458,017
Less accumulated amortization		(940,731	)		(770,691	)
	$	1,527,767		$	1,687,326

Amortization expense from amortizable intangible assets, other than lease agreements, was $174,518, $166,537 and $167,956 for 2016, 2015 and 2014, respectively. Lease agreement intangible assets and liabilities were amortized to rent expense in the amounts of $(923), $(1,613) and $(1,798) for 2016, 2015 and 2014, respectively.

During the year ended December 31, 2016, the Company did not recognize impairment charges on any intangible assets other than goodwill. During the year ended December 31, 2015, the Company recognized a $17,400 impairment charge on an indefinite-lived intangible asset of its DMG Nevada reporting unit.

Amortizable intangible liabilities were comprised of the following:

	December 31,
	2016		2015
Lease agreements (net of accumulated amortization of $8,485 and $6,936)		7,420		8,969
	$	7,420	$	8,969

There was no amortization benefit recognized from the alliance and product supply agreement in 2016 as it expired in September 2015. Amortization benefit related to this agreement was $3,997 for 2015 and $5,330 for 2014 related to this agreement. Lease agreement intangible liabilities are classified in other long-term liabilities and amortized to rent expense.

Scheduled amortization charges from amortizable intangible assets and liabilities as of December 31, 2016 were as follows:

	Customer relationships		Trade names		Provider network and practice management tools		Noncompetition and other agreements		Lease agreements			Other
2017		82,669		47,046		26,941		30,156		(1,228	)		102
2018		82,664		47,046		26,881		19,519		(892	)		102
2019		82,625		11,008		22,492		15,796		(832	)		87
2020		82,609		3,800		581		10,437		(678	)		44
2021		82,609		633		97		7,005		(606	)		—
Thereafter		821,282		—		—		21,990		(3,184	)		—