Loans and Allowance for Loan Losses (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable [Line Items]
Allowance for Loan and Lease Losses, Write-offs	$ 13,344,000	$ 30,968,000	$ 128,424,000
Allowance for Loan Losses, Recovery	10,292,000	6,873,000	6,735,000
Allowance for Loan and Lease Losses, Net Write-downs	3,052,000	24,095,000	121,689,000
Loans and Leases Receivable, Ratio, Allowance for Loan and Lease Losses to Loans and Leases Receivables	2.21%	2.49%	3.23%
Real estate - mortgage, 1-4 family residential [Member] | PC [Member] | Granite Corp. [Member]
Financing Receivable [Line Items]
Loans purchases	157,600,000	173,200,000
Loans purchases premium	$ 1,300,000	$ 4,000,000