Goodwill and Core Deposit and Trust Relationship Intangibles (Changes in Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill	$ 48,376	$ 48,376	$ 42,470
Accumulated impairment losses	(3,570)	(740)	(740)
Reported goodwill	44,806	47,636	41,730
Activity for the year	(2,830)	5,906
Financial Services
Goodwill [Line Items]
Goodwill	7,474	7,474	7,750
Accumulated impairment losses	(3,570)	(740)	(740)
Reported goodwill	3,904	6,734	7,010
Activity for the year	(2,830)	(276)
Banking [Member]
Goodwill [Line Items]
Goodwill	40,902	40,902	34,720
Accumulated impairment losses	0	0	0
Reported goodwill	40,902	40,902	34,720
Activity for the year	$ 0	$ 6,182