Pending Acquisition Pending Acquisition (Narrative)(Details) - HIghland County Bankshares Inc and Subsidiary First and Citizens Bank [Member] - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2016	Feb. 29, 2016
Business Acquisition [Line Items]
Business Acquisition, Share Price		$ 38.00
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	$ 130

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant