Summary of Significant Accounting Policies (Deferred Financing Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Deferred financing costs	$ 25,061	$ 24,821
Amortization expense	7,468	10,263	11,744
Accumulated amortization	$ 14,656	$ 8,932