Employee Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Employee Stock Ownership Plan (ESOP), cash contributions to ESOP	$ 99,000	$ 129,000	$ 141,000
Employee Stock Ownership Plan (ESOP), number of allocated shares	221,106	215,419
Employee Stock Ownership Plan (ESOP), number of unallocated shares	9,562	18,444
Employee Stock Ownership Plan (ESOP), allocated shares market value	$ 6,700,000	$ 4,900,000
Employee Stock Ownership Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan requisite service period	1 year
Employee benefit plan vesting period	3 years
Employee Stock Ownership Plan (ESOP) promissory note amortization period	7 years
Promissory notes	$ 169,000	$ 316,000
Share Price	$ 29.00	$ 20.96
Prime Rate [Member] | Employee Stock Ownership Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Stock Ownership Plan (ESOP) basis spread on variable rate	1.00%
401 (K) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan requisite service period	6 months	6 months	6 months
Employee benefit plan vesting period	3 years	3 years	3 years
Percentage of employees contribution the employer will match	50.00%	50.00%	50.00%
Retirement plan expense	$ 346,000	$ 332,000	$ 324,000
Individual Supplemental Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement plan expense	$ 525,000	519,000	441,000
Number of years following retirement benefit is paid	15 years
Nonqualified Retirement Plan For Non Employee Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan requisite service period	15 years
Employee benefit plan vesting period	2 years
Retirement plan expense	$ 20,000	$ 22,000	$ 21,000
Maximum annual benefit following retirement	$ 3,500
Number of years following retirement benefit is paid	10 years
Maximum [Member] | 401 (K) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum employee contribution employer will match	8.00%	8.00%	8.00%