Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 5,722		$ 4,944
Other comprehensive (loss) income, net of tax:
Net unrealized holding gains arising during the period (tax effects for the three months 2015: $1,401; 2014: $2,960)	2,601		5,495
Reclassification adjustment for net realized losses on securities recorded in income [1] (tax effects for the three months 2015: $58)	108	[1]	0	[1]
Other comprehensive income	2,709		5,495
Total comprehensive income	$ 8,431		$ 10,439

[1] Amounts are included in net gains on sales/calls of securities on the Consolidated Statements of Income in total noninterest income.