Noncontrolling Interests (Preferred Stockholders' Equity in Subsidiaries) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012 Redeemable Preferred Stock Member	Dec. 31, 2012 Redeemable Preferred Stock Member
Noncontrolling Interest [Line Items]
Shares, Outstanding			300,000	300,000
Preferred Stock, Value, Issued	$ 4	$ 4	$ 300,000	$ 300,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		25.00%
Noncontrolling Interest, Ownership Percentage by Parent		75.00%
Preferred Stock, Dividend Rate, Percentage	4.00%	4.00%	6.125%
Preferred stock-perpetual voting, dividend increase percentage each interval once shares become callable			50.00%
Preferred Stock, Cumulative Dividend Period				4 years
Preferred Stock, Cumulative Dividend Increase Interval if Outstanding Once Callable				6 months