Segment Information (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segments	Mar. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (in segments) | segments	2
Interest expense	$ 3,548	$ 2,699
CAM [Member]
Segment Reporting Information [Line Items]
Interest expense	$ 3,300	$ 2,300