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Other Borrowings (Schedule of Borrowings) (Details) (USD $)
0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Heritage
Dec. 31, 2013
Advances from the FHLB
Dec. 31, 2012
Advances from the FHLB
Dec. 31, 2013
Wholesale Repurchase Agreements
Dec. 31, 2012
Wholesale Repurchase Agreements
Dec. 31, 2013
Trust Preferred Securities
Dec. 31, 2012
Trust Preferred Securities
Dec. 31, 2013
Senior Notes
Dec. 31, 2012
Senior Notes
Dec. 31, 2013
Notes Payable to Unaffiliated Bank
Dec. 31, 2012
Notes Payable to Unaffiliated Bank
Dec. 31, 2013
Contracts Payable for Purchase of Real Estate and Other Assets
Dec. 31, 2012
Contracts Payable for Purchase of Real Estate and Other Assets
Apr. 20, 2011
Bank One
Loans Payable
Apr. 20, 2011
Interest Rate Swap
Bank One
Debt Instrument [Line Items]                                  
Long-term debt $ 350,109,000 $ 389,025,000   $ 113,453,000 $ 143,195,000 $ 60,000,000 $ 85,000,000 $ 124,860,000 $ 108,250,000 $ 37,500,000 $ 37,500,000 $ 11,719,000 $ 13,002,000 $ 2,577,000 $ 2,078,000 $ 15,000,000  
Weighted average interest rate       3.06% 3.11% 3.38% 3.12%                    
FHLB stock, required collateral 14,200,000 9,600,000                              
Additional collateral, aggregate fair value 1,320,000,000 1,120,000,000                              
FHLB borrowing capacity 310,600,000                                
Securities pledged as collateral $ 0 $ 380,000 $ 380,000                            
Fixed interest rate on derivative                                 5.14%
Derivative maturity                                 5 years