Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Accounting Policies [Abstract]

Percentage of Net Service Revenue Earned by Type of Ownership or Relationship with Operating Entity

The following table summarizes the percentage of net service revenue earned by type of ownership or relationship the Company had with the operating entity:

	Three Months Ended    June 30,				Six Months Ended   June 30,
Ownership type	2017		2016		2017		2016
Wholly-owned subsidiaries	53.3	%	57.0	%	53.5	%	56.9	%
Equity joint ventures	45.1		41.3		44.8		41.4
Other	1.6		1.7		1.7		1.7
	100.0	%	100.0	%	100.0	%	100.0	%

Percentage of Net Service Revenue Earned by Category of Payor

The following table sets forth the percentage of net service revenue earned by category of payor for the three and six months ended June 30, 2017 and 2016:

	Three Months Ended    June 30,				Six Months Ended   June 30,
Payor:	2017		2016		2017		2016
Medicare	71.5	%	75.3	%	71.8	%	74.9	%
Medicaid	2.0		1.8		1.8		1.7
Managed Care, Commercial, and Other	26.5		22.9		26.4		23.4
	100.0	%	100.0	%	100.0	%	100.0	%

Shares Used in Computation of Basic and Diluted Per Share Information

The following table sets forth shares used in the computation of basic and diluted per share information:

	Three Months Ended    June 30,		Six Months Ended   June 30,
	2017	2016	2017	2016
Weighted average number of shares outstanding for basic per share calculation	17,728,567	17,566,097	17,686,134	17,525,937
Effect of dilutive potential shares:
Options	—	1,379	—	1,715
Nonvested stock	235,820	117,671	225,589	121,968
Adjusted weighted average shares for diluted per share calculation	17,964,387	17,685,147	17,911,723	17,649,620
Anti-dilutive shares	—	30,001	149,100	211,101