Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net Income	$ 6,332	$ 6,267	$ 17,684	$ 16,548
Other Comprehensive Income
Increase in Net Unrealized Gains on Available-for-Sale Securities	2,944	3,190	7,865	6,617
Reclassification Adjustment for Realized Gains on Available-for-Sale Securities Included in Net Income	(149)	0	(149)	0
Deferred Tax Expense	(1,175)	(1,340)	(3,244)	(2,782)
Change in Net Unrealized Gains on Available-for-Sale Securities, Net of Tax	1,620	1,850	4,472	3,835
Total Other Comprehensive Income	1,620	1,850	4,472	3,835
Comprehensive Income	$ 7,952	$ 8,117	$ 22,156	$ 20,383