Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net Income	$ 6,432	$ 6,352	$ 18,818	$ 18,168
Other Comprehensive Income (Loss)
(Decrease) Increase in Net Unrealized (Losses) Gains on Available-for-Sale Securities	(1,752)	1,681	5,929	(12,907)
Reclassification Adjustment for Realized (Gains) Losses on Available-for-Sale Securities Included in Net Income	(4)	1,137	(38)	248
Deferred Tax Benefit (Expense)	738	(1,185)	(2,477)	5,322
Change in Net Unrealized (Losses) Gains on Available-for-Sale Securities, Net of Tax	(1,018)	1,633	3,414	(7,337)
Total Other Comprehensive (Loss) Income	(1,018)	1,633	3,414	(7,337)
Comprehensive Income	$ 5,414	$ 7,985	$ 22,232	$ 10,831