Derivatives and Hedging Activities Other Comprehensive Income (Details) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 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)			(3,840)	(11,812)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 1,042	$ 1,607	3,359	5,590
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest			25	328
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent			(456)	(5,894)
Ending Balance	$ (2,045)	$ (6,306)	$ (2,045)	$ (6,306)