Condensed Financial Statements - Parent Company Only (Schedule of Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 13, 2015	Dec. 31, 2014
Assets
Other assets	$ 10,481	$ 11,043
Total assets	1,405,961	1,334,257
Liabilities and Stockholders' Equity
Guaranteed preferred beneficial interest in junior subordinated debentures (TRUPs)	12,000	12,000
Subordinated notes - 6.25%	23,000	23,000
Total liabilities	1,296,004	1,229,831
Stockholders' Equity
Preferred stock, value				$ 20,000
Common stock	46	46
Additional paid in capital	48,209	47,377
Retained earnings	63,648	58,100
Accumulated other comprehensive income	(1,191)	(928)	$ (251)		$ (378)
Unearned ESOP shares	(755)	(169)
Total stockholders' equity	109,957	104,426	$ 99,783		$ 116,559
Total Liabilities and Stockholders' Equity	1,405,961	1,334,257
Parent Company [Member]
Assets
Cash - noninterest bearing	2,812	2,366
Investment in wholly owned subsidiaries	139,418	136,481
Other assets	4,491	2,017
Total assets	146,721	140,864
Liabilities and Stockholders' Equity
Current liabilities	1,392	1,066
Guaranteed preferred beneficial interest in junior subordinated debentures (TRUPs)	12,372	12,372
Subordinated notes - 6.25%	23,000	23,000
Total liabilities	36,764	36,438
Stockholders' Equity
Common stock	46	46
Additional paid in capital	48,209	47,377
Retained earnings	63,648	58,100
Accumulated other comprehensive income	(1,191)	(928)
Unearned ESOP shares	(755)	(169)
Total stockholders' equity	109,957	104,426
Total Liabilities and Stockholders' Equity	$ 146,721	$ 140,864