Significant Accounting Policies (Investment in LLC) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Mandatory Redemption Date 2	Dec. 31, 2013
Limited Liability Investment Agreement Date	Jun. 22, 2011
Payments to Acquire Equity Method Investments	$ 30,594,000	$ 52,250,000	$ 35,000,000
Equity Method Investment, Ownership Percentage	30.60%
Distribution from limited liability company	17,500,000
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	59.00%
Initial Investment [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Aggregate Cost			$ 35,000,000