Equity Investments in Unconsolidated Subsidiaries (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
CT Opportunity Partners I, LP
Commitment to invest in equity method investments maximum amount	$ 25,000
Percentage of total capital commitment to invest	4.60%
Funded commitment amount, total	17,100
Return of capital on equity method investments	6,500
Funded commitment amount, net	10,500
Unfunded commitment amount	14,500
Maximum exposure to loss from equity investment	8,200
Incentive compensation	5,000
CT High Grade II
Funded commitment amount, net	2,900
Unfunded commitment amount	480
Maximum exposure to loss from equity investment	2,800
Ownership, percentage	44.00%
Initial co-investment	$ 2,800