Goodwill and intangible assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Goodwill and Intangible Assets

A summary of goodwill and intangible assets at December 31, 2016 and 2015 is as follows:

	Weighted
	average	Gross
	amortization	carrying		Accumulated			Net carrying
December 31, 2016	period (years)	amount		amortization			Amount
Customer relationships	11.1	$	171,782		(72,655	)	$	99,127
Noncompete agreements	5.0		14,500		(12,027	)		2,473
Favorable leases	7.5		2,935		(1,643	)		1,292
Order backlog	0.4		3,400		(3,400	)		—
Reacquired franchise rights	5.8		8,950		(4,280	)		4,670
			201,567		(94,005	)		107,562
Indefinite-lived intangible:
Trade and brand names	N/A		146,300		—			146,300
Total intangible assets		$	347,867	$	(94,005	)	$	253,862
Goodwill		$	176,981	$	—		$	176,981

	Weighted
	average	Gross
	amortization	carrying		Accumulated			Net carrying
December 31, 2015	period (years)	amount		amortization			Amount
Customer relationships	11.1	$	171,782		(57,741	)	$	114,041
Noncompete agreements	5.0		14,500		(9,127	)		5,373
Favorable leases	7.5		2,935		(1,256	)		1,679
Order backlog	0.4		3,400		(3,400	)		—
Reacquired franchise rights	5.8		8,950		(2,724	)		6,226
			201,567		(74,248	)		127,319
Indefinite-lived intangible:
Trade and brand names	N/A		146,300		—			146,300
Total intangible assets		$	347,867	$	(74,248	)	$	273,619
Goodwill		$	176,981	$	—		$	176,981

Summary of Amortization expenses

The anticipated annual amortization expense to be recognized in future years as of December 31, 2016 is as follows:

	Amount
2017	$	18,215
2018		14,583
2019		14,215
2020		12,517
2021		12,422
Thereafter		35,610
Total	$	107,562