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FAIR VALUE MEASUREMENTS (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Forward Commitments
Mar. 31, 2013
Trading Account Security
item
Mar. 31, 2012
Trading Account Security
Mar. 31, 2013
Securities Available for Sale
Mar. 31, 2012
Securities Available for Sale
Dec. 31, 2011
Securities Available for Sale
Mar. 31, 2013
Securities Available for Sale
Pooled trust preferred security
item
Mar. 31, 2013
Interest rate lock commitments
Changes in Level 3 assets and liabilities that were measured at fair value on a recurring basis                    
Number of securities in the portfolio       1         1  
Changes in Level 3 assets that were measured at fair value on a recurring basis                    
Balance at the beginning of the period       $ 16,893 $ 17,395 $ 885 $ 544 $ 544   $ 6,258
Purchase of Marketable Equity Security           770        
Unrealized gain recognized in other non-interest income       (280) (428)         3,998
Unrealized loss included in accumulated other comprehensive loss           13        
Paydown of trading account security 354 488   (128) (120)          
Transfers to held for sale loans                   (7,498)
Balance at the end of the period       16,485 16,847 1,668 544 544   2,758
Unrealized gains (losses) relating to instruments still held at the end of the period       3,004 2,871 (1,704) (2,055)     2,758
Liabilities                    
Balance at the beginning of the period     1,055              
Unrealized gain recognized in other non-interest income     538              
Balance at the end of the period     $ (517)