General and administrative expenses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
General and Administrative Expenses
Professional services	$ 639		$ 256
Operating and other costs	436		594
Subtotal	1,075		850
Non-cash personnel costs
Management incentive awards plan - CT Legacy Partners	963	[1]	(282)	[1]
Employee stock-based compensation			129
Subtotal	963		(153)
Expenses of consolidated securization vehicles			59
Total	$ 2,038		$ 756

[1] Represents the accrual of amounts payable under the CT Legacy Partners management incentive awards during the period. See Note 3 for discussion of the CT Legacy Partners management incentive awards plan.