Loans and Allowance for Loan Losses (Troubled Debt Restructurings Modified by Portfolio Class) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2017 USD ($) contract	Mar. 31, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	13	11
Pre-Modification Outstanding Recorded Investment	$ 45,092	$ 51,246
Post-Modification Outstanding Recorded Investment	$ 45,092	$ 51,246
Total Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	10	11
Pre-Modification Outstanding Recorded Investment	$ 39,315	$ 51,246
Post-Modification Outstanding Recorded Investment	$ 39,315	$ 51,246
Total Commercial [Member] \| Commercial Real Estate - Income Producing [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	2
Pre-Modification Outstanding Recorded Investment	$ 5,527
Post-Modification Outstanding Recorded Investment	$ 5,527
Total Commercial [Member] \| Construction and Land Development [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	1
Pre-Modification Outstanding Recorded Investment	$ 250
Post-Modification Outstanding Recorded Investment	$ 250
Total Commercial & Industrial [Member] \| Total Commercial [Member] \| Commercial Non-Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	9	11
Pre-Modification Outstanding Recorded Investment	$ 38,659	$ 51,246
Post-Modification Outstanding Recorded Investment	$ 38,659	$ 51,246
Total Commercial & Industrial [Member] \| Total Commercial [Member] \| Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	1
Pre-Modification Outstanding Recorded Investment	$ 656
Post-Modification Outstanding Recorded Investment	$ 656

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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