Loans and Asset Quality Information (Summary of Nonperforming Assets) (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Nonperforming assets:
Nonaccrual loans		$ 25,494	$ 20,968	$ 22,795
Restructured loans - accruing		17,386	19,834	21,019
Accruing loans > 90 days past due
Total nonperforming loans		42,880	40,802	43,814
Foreclosed real estate		8,296	12,571	11,196
Total nonperforming assets		51,176	53,373	55,010
Purchased credit impaired loans not included above	[1]	$ 20,832	$ 23,165	$ 16,846

[1] In the March 3, 2017 acquisition of Carolina Bank, and the October 1, 2017 acquisition of Asheville Savings Bank, the Company acquired $19.3 million and $9.9 million, respectively, in PCI loans in accordance with ASC 310-30 accounting guidance. These loans are excluded from nonperforming loans, including $0.5 million, $0.6 million, and $0.4 million in PCI loans at June 30, 2018, December 31, 2017, and June 30, 2017, respectively, that were contractually past due 90 days or more.