Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Allowance for uncollectible accounts	$ 3,901	$ 3,582
Accrued employee benefits	3,250	2,665
Stock compensation	1,593	1,362
Accrued self-insurance	2,097	2,161
Acquisition costs	861	650
Net operating loss carry forward	779	542
Valuation allowance	(44)	(44)
Dividend received deduction		(78)
Intangible asset impairment	60	66
Litigation reserve	31	41
Uncertain tax position-state tax portion	215	215
Charitable contribution carryforward		17
Other	489
Deferred tax assets	13,232	11,179
Deferred tax liabilities:
Amortization of intangible assets	(21,455)	(17,508)
Tax depreciation in excess of book depreciation	(7,007)	(7,182)
Prepaid expenses	(765)	(655)
Non-accrual experience accounting method	(1,302)	(968)
Conversion from cash basis accounting		(120)
Deferred state tax receivable	(161)
Deferred tax liabilities	(30,690)	(26,433)
Net deferred tax liability	$ (17,458)	$ (15,254)