Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net Income	$ 6,749	$ 6,104	$ 13,152	$ 12,386
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Available-for-Sale Securities	(3,177)	4,633	(1,550)	7,681
Deferred Tax Benefit (Expense) Related to Unrealized Gains	1,335	(1,947)	651	(3,229)
Reclassification Adjustment for Realized Gains on Available-for-Sale Securities Included in Net Income	(5)	(31)	(6)	(34)
Deferred Tax Benefit Related to Reclassification Adjustment	4	12	3	14
Change in Net Unrealized Gain (Loss) on Available-for-Sale Securities, Net of Tax	(1,843)	2,667	(902)	4,432
Total Other Comprehensive (Loss) Income	(1,843)	2,667	(902)	4,432
Comprehensive Income	$ 4,906	$ 8,771	$ 12,250	$ 16,818