Business Combinations (Narrative) (Details) - USD ($) shares in Millions			9 Months Ended
	Apr. 01, 2015	May. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Equity interests issued as consideration			$ 0	$ 83,517,000
Tax Receivable, Overstated			543,000
Increase (Decrease) in Income Taxes Receivable			$ 543,000
The MDE Group [Member]
Business Acquisition [Line Items]
Goodwill	$ 20,100,000
Contingent consideration	$ 2,000,000
Contingent consideration term	4 years
Contingent consideration maximum amount	$ 12,500,000.0
Team Capital Bank [Member]
Business Acquisition [Line Items]
Goodwill		$ 40,897,000
Total assets		963,974,000
Loans		631,209,000
Deposits		769,936,000
Total consideration paid		115,100,000
Cash paid		31,600,000
Equity interests issued as consideration		$ 83,500,000
Team Capital Bank [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued as consideration (in shares)		4.9
Customer Relationships [Member] | The MDE Group [Member]
Business Acquisition [Line Items]
Intangible customer relationship	$ 7,000,000