CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Cash and cash equivalents, restrictions on distributions (in dollars)		$ 41,634
Bonds available-for-sale, pledged as collateral (in dollars)	132,930	925,346
Real estate held-for-use, net, pledged as collateral (in dollars)	15,595	17,756
Other assets, pledged as collateral (in dollars)	12,054	14,691
Preferred stock, liquidation preference, value (in dollars)		159,000
Noncontrolling interests in consolidated funds and ventures, subscriptions receivable (in dollars)		$ 1,533
Common shares, shares issued (in shares)	40,902,784	40,638,614
Common shares, shares outstanding (in shares)	40,902,784	40,638,614
Common shares, non-employee directors' and employee deferred shares (in shares)	1,310,226	1,873,348