Transactions with Related Parties (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Guaranty obligation	$ 700.0
Sandhill [Member]
Related Party Transaction [Line Items]
Due from related parties	0.2	0.3
Percentage of obligation guaranteed	50.00%
Loan held by related party	0.8	1.2
Guaranty obligation	$ 0.4	$ 0.6
Sandhill Group, LLC [Member]
Related Party Transaction [Line Items]
Ownership percentage	50.00%