Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Expected income tax expense at federal tax rate													$ 3,994	$ 3,392	$ 3,490
State taxes net of federal benefit													796	647	604
Nondeductible expenses													37	40	39
Nontaxable income													(375)	(398)	(345)
Other													(36)	(48)	(12)
Income tax expense (benefit), total	$ 1,356	$ 1,014	$ 1,078	$ 968	$ 811	$ 735	$ 1,004	$ 1,083	$ 579	$ 1,363	$ 760	$ 1,074	$ 4,416	$ 3,633	$ 3,776
Expected income tax expense at federal tax rate													34.00%	34.00%	34.00%
State taxes net of federal benefit													6.78%	6.49%	5.88%
Nondeductible expenses													0.31%	0.40%	0.38%
Nontaxable income													(3.19%)	(3.99%)	(3.36%)
Other													(0.31%)	(0.48%)	(0.12%)
Total income tax expense													37.59%	36.42%	36.78%
Parent Company [Member]
Income tax expense (benefit), total													$ (1,321)	$ (1,009)	$ (589)