Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Allowance for uncollectible accounts	$ 5,127	$ 3,901
Accrued employee benefits	3,420	3,250
Stock compensation	1,503	1,593
Accrued self-insurance	2,257	2,097
Acquisition costs	1,155	861
Net operating loss carry forward	873	779
Intangible asset impairment	55	60
Uncertain tax position-state tax portion	215	215
Other	61	520
Valuation allowance	(44)	(44)
Deferred tax assets	14,622	13,232
Deferred tax liabilities:
Amortization of intangible assets	(25,202)	(21,455)
Tax depreciation in excess of book depreciation	(7,171)	(7,007)
Prepaid expenses	(786)	(765)
Non-accrual experience accounting method	(1,223)	(1,302)
Deferred state tax receivable	(49)	(161)
Deferred tax liabilities	(34,431)	(30,690)
Net deferred tax liability	$ (19,809)	$ (17,458)