Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000741516 (http://www.sec.gov/CIK)

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of summary of stock option transactions	A summary of stock option transactions for the year ended December 31, 2016 is as follows:   Option Shares   Weighted Average Exercise Price   Weighted Average Remaining Contractual Term   Aggregate Intrinsic Value ($000) Outstanding at December 31, 2015 67,871   $ 24.47         Replacement stock options —   —         Granted —   —         Exercised 5,784   24.46         Forfeited —   —         Expired 3,676   26.05         Outstanding at December 31, 2016 58,411   $ 24.37   1.75 years   $ 618 Exercisable at December 31, 2016 58,411   $ 24.37   1.75 years   $ 618
Schedule of summary of information related to stock options outstanding	The following table summarizes information related to stock options outstanding on December 31, 2016: Options Outstanding and Exercisable Range of Exercise Prices   Number of Outstanding Options   Weighted- Average Remaining Contractual Life   Weighted- Average Exercise Price $20.00 to $25.00   33,166   1.98 years   $ 22.27 $25.01 to $30.00   22,275   1.55   25.82 $30.01 to $41.67   2,970   0.70   37.04     58,411   1.75 years   $ 24.37
Schedule of Nonvested restricted stock activity	Nonvested restricted stock activity for the year ended December 31, 2016 is summarized in the following table: Restricted Stock Shares   Weighted Average Grant Date Value Nonvested at December 31, 2015 41,563   $ 22.15 Granted 29,025   23.55 Vested (19,219 )   21.47 Forfeited (547 )   21.98 Nonvested at December 31, 2016 50,822   23.21