Debt (Maturities) (Details)	3 Months Ended
	Mar. 31, 2016 USD ($)
Guarantees
Amount of independent assets	$ 0
Amount of independent operations	0
Revolving credit facility
Aggregate maturities of debt including future interest for each of the five years
Total	355,702,000
Year 1	23,982,000
Year 2	23,608,000
Year 3	31,295,000
Year 4	38,826,000
Year 5	$ 237,991,000