Consolidated Statements of Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest on other borrowings	$ 3,741	$ 3,623	$ 11,084	$ 11,122
Securities gains, net	825	1,118	2,460	6,612
Income taxes	2,916	1,492	8,769	10,289
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Derivatives [Member]
Interest on other borrowings	577	523	1,671	1,552
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Securities gains, net	825	1,118	2,460	6,612
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Income taxes	$ 93	$ 222	$ 296	$ 1,887