Derivatives and Hedging Activities Other Comprehensive Income (Details) (Parent Company [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Parent Company [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (412)	$ 108
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	(4,347)	(997)
Other Comprehensive Loss, Reclassification Adjustment from AOCI on Derivatives, Net of Tax	2,192	3,725
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	114	(145)
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent	(2,041)	2,583
Ending Balance	$ (2,453)	$ 2,691