Derivatives and Hedging Activities Other Comprehensive Income (Details) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (1,589)	$ (412)
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)			(5,019)	(2,543)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 1,131	$ 1,791	2,317	3,983
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest			141	(76)
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent			(2,561)	1,364
Ending Balance	$ (4,150)	$ 952	$ (4,150)	$ 952