Allowance for Loan Losses Schedule of Credit Losses Related to Acquired Financing Receivables, Current (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
allowance for acquired impaired loan losses [Line Items]
Provision for Loan and Lease Losses	$ 8,248	$ 14,536
Acquired Loans
allowance for acquired impaired loan losses [Line Items]
Provision for Loan and Lease Losses	36	2,233
Financing Receivable, Allowance for Credit Losses	7,493	2,974	7,457	741
Allowance for Loan and Lease Losses, Write-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	$ 0	$ 0