Goodwill and Intangibles- Summary of Changes in Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite And Infinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	$ 95,548	$ 90,569
Definite-lived assets, gross carrying amount	14,858	14,332
Intangible assets, gross carrying amount	110,406	104,901
Definite-lived assets, accumulated amortization	(9,716)	(8,496)
Definite-lived assets, net carrying amount	5,142	5,836
Intangible assets, net carrying amount	100,690	96,405
Certificates of need/licenses
Finite And Infinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	32,193	29,807
Trade names
Finite And Infinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	63,355	60,762
Definite-lived assets, gross carrying amount	9,298	8,985
Definite-lived assets, accumulated amortization	(5,184)	(4,385)
Definite-lived assets, net carrying amount	$ 4,114	$ 4,600
Trade names | Minimum
Finite And Infinite Lived Intangible Assets [Line Items]
Estimated useful life	1 year	2 months
Trade names | Maximum
Finite And Infinite Lived Intangible Assets [Line Items]
Estimated useful life	10 years	5 years
Non-compete agreements
Finite And Infinite Lived Intangible Assets [Line Items]
Definite-lived assets, gross carrying amount	$ 5,560	$ 5,347
Definite-lived assets, accumulated amortization	(4,532)	(4,111)
Definite-lived assets, net carrying amount	$ 1,028	$ 1,236
Non-compete agreements | Minimum
Finite And Infinite Lived Intangible Assets [Line Items]
Estimated useful life	8 months	3 months
Non-compete agreements | Maximum
Finite And Infinite Lived Intangible Assets [Line Items]
Estimated useful life	3 years	2 years