Basis of Presentation and Significant Accounting Policies (Summary of Activity Related to Electronic Health Records Incentives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Electronic Health Records Incentives Earned [Abstract]
Electronic health records incentives receivable at beginning of period	$ 4,189	$ 11,227
Electronic health records incentives earned	2,452	4,208
Cash incentive payments received	(842)	(7,625)
Adjustments to receivable based on final cost report settlement or audit	(221)	(1,925)
Electronic health records incentives receivable at end of period	5,578	5,885
Deferred revenue related to electronic health records incentives at beginning of period	0	0
Cash received and deferred during period	0	(4,693)
Recognition of deferred incentives as earned	0	0
Deferred revenue related to electronic health records incentives at end of period	0	(4,693)
Total electronic health records incentives earned during period	2,452	4,208
Total cash incentive payments received during period	$ 842	$ 12,318