Parent Corporation Only Financial Statements (Details) - Condensed Statements of Income - 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, 2016	Dec. 31, 2015	Dec. 31, 2014
Income:
Dividend income from subsidiaries									$ 1,410	$ 1,081	$ 636
Net Income	$ (2,024)	$ 11,856	$ 10,859	$ 10,391	$ 9,568	$ 10,842	$ 10,521	$ 10,379	31,082	41,311	18,565
Parent Company [Member]
Income:
Dividend income from subsidiaries									12,400	10,537	9,276
Other income									8	7	6
Management fees											100
Total Income									12,408	10,544	9,382
Expenses									(3,252)	(1,705)	(707)
Income before equity in undistributed earnings of subsidiaries									9,156	8,839	8,675
Equity in undistributed earnings of subsidiaries									21,926	32,472	9,890
Net Income									$ 31,082	$ 41,311	$ 18,565