Derivatives and Hedging Activities Other Comprehensive Income (Details) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 1,144	$ (1,589)
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)			(1,252)	(3,840)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ (33)	$ 1,042	884	3,359
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest			14	25
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent			(354)	(456)
Ending Balance	$ 790	$ (2,045)	$ 790	$ (2,045)