Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Line Items]
Maximum amount of time between receipt and application of Federal aid funds	3 days
Graham Healthcare Group [Member]
Summary of Significant Accounting Policies [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	90.00%
Minimum [Member] | Machinery and Equipment [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life (in years)	3 years
Minimum [Member] | Building [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life (in years)	20 years
Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Investment maturity length	3 months
Amortized Intangible Assets, Useful Life (in years)	10 years
Maximum [Member] | Machinery and Equipment [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life (in years)	20 years
Maximum [Member] | Building [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life (in years)	50 years