CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Bonds available-for-sale, pledged as collateral	$ 1,153,759	$ 1,197,180
Investment in preferred stock, pledged as collateral	1,000	2,000
Other assets, pledged as collateral	13,318	12,527
Perpetual preferred shareholders' equity in a subsidiary company, liquidation preference	163,000	173,000
Noncontrolling interests in consolidated funds and ventures, subscriptions receivable	7,061	1,922
Common shares, no par value	$ 0	$ 0
Common shares, shares issued	40,258,312	40,204,049
Common shares, shares outstanding	40,258,312	40,204,049
Common shares, Non-employee directors' and employee deferred shares issued	962,451	647,782
Unconsolidated Affiliates
Investments in unconsolidated ventures, pledged as collateral	6,779	6,779
Loans Held for Investment
Loans, pledged as collateral	14,184	53,096
Loans Held-for-Sale
Loans, pledged as collateral	$ 4,397	$ 18,024