Loans and Allowance for Credit Losses (Details 4) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Nonaccrual loan, recorded investment	[1],[2]	$ 17,148	$ 17,875	$ 21,380
Commercial Portfolio Segment [Member]
Nonaccrual loan, recorded investment		3,202	2,490	3,775
Income Producing Portfolio Segment [Member]
Nonaccrual loan, recorded investment		1,471	10,539	10,234
Owner Occupied Portfolio Segment [Member]
Nonaccrual loan, recorded investment		5,370	2,093	1,261
Residential Portfolio Segment [Member]
Nonaccrual loan, recorded investment		304	555	576
Construction Portfolio Segment [Member]
Nonaccrual loan, recorded investment		6,115	2,072	5,413
Home Equity Portfolio Segment [Member]
Nonaccrual loan, recorded investment		594		$ 121
Other Consumer Portfolio Segment [Member]
Nonaccrual loan, recorded investment		$ 92	$ 126

[1] Excludes troubled debt restructurings ("TDRs") that were performing under their restructured terms totaling $12.7 million at June 30, 2017, as compared to $7.9 million at December 31, 2016 and $7.3 million at June 30, 2016.

[2] Gross interest income of $322 thousand and $626 thousand would have been recorded for the three and six months ended June 30, 2017, if nonaccrual loans shown above had been current and in accordance with their original terms while interest actually recorded on such loans was $265 thousand and $355 thousand for the three and six months ended June 30, 2017. See Note 1 to the Consolidated Financial Statements for a description of the Company's policy for placing loans on nonaccrual status.