Derivatives and Hedging Activities Other Comprehensive Income (Details) (Parent Company [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Parent Company [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 108	$ (26,054)
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	(8,400)	11,922
Other Comprehensive Loss, Reclassification Adjustment from AOCI on Derivatives, Net of Tax	6,810	8,477
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	87	(681)
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent	(1,503)	19,718
Ending Balance	$ (1,395)	$ (6,336)