Loans and Allowance for Loan Losses (Troubled Debt Restructurings Modified by Portfolio Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) contract	Mar. 31, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11	3
Pre-Modification Outstanding Recorded Investment	$ 51,246	$ 88
Post-Modification Outstanding Recorded Investment	$ 51,246	$ 88
Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11	3
Pre-Modification Outstanding Recorded Investment	$ 51,246	$ 88
Post-Modification Outstanding Recorded Investment	$ 51,246	$ 88
Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Non-Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11
Pre-Modification Outstanding Recorded Investment	$ 51,246
Post-Modification Outstanding Recorded Investment	$ 51,246
Commercial Non-Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11
Pre-Modification Outstanding Recorded Investment	$ 51,246
Post-Modification Outstanding Recorded Investment	$ 51,246
Commercial Non-Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Non-Real Estate [Member] | FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Commercial Real Estate [Member] | FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		2
Pre-Modification Outstanding Recorded Investment		$ 68
Post-Modification Outstanding Recorded Investment		$ 68
Residential Mortgages [Member] | Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		2
Pre-Modification Outstanding Recorded Investment		$ 68
Post-Modification Outstanding Recorded Investment		$ 68
Residential Mortgages [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Residential Mortgages [Member] | FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		1
Pre-Modification Outstanding Recorded Investment		$ 20
Post-Modification Outstanding Recorded Investment		$ 20
Consumer [Member] | Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		1
Pre-Modification Outstanding Recorded Investment		$ 20
Post-Modification Outstanding Recorded Investment		$ 20
Consumer [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Consumer [Member] | FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Construction and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Construction and Land Development [Member] | Originated Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Construction and Land Development [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Construction and Land Development [Member] | FDIC Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment