Securities Part 2 (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Held-to-Maturity, Nominal Yield (in hundredths)	4.58%
Municipal and Other Tax Exempt Securities [Member]
Held-to-Maturity, Amortized Cost [Abstract]
Held-to-Maturity, Amortized Cost,Less Than One Year	36,814
Held-to-Maturity, Amortized Cost,One to Five Years	64,881
Held-to-Maturity, Amortized Cost,Six to Ten Years	21,162
Held-to-Maturity, Amortized Cost,Over Ten Year	3,311
Held-to-Maturity, Amortized Cost, Weighted Average Maturity (in years)	2.93	[1]
Held-to-Maturity, Fair Value [Abstract]
Held-to-Maturity, Fair Value, Less Than One Year	37,171
Held-to-Maturity, Fair Value, One to Five Years	67,131
Held-to-Maturity, Fair Value, Six to Ten Years	22,456
Held-to-Maturity, Fair Value, Over Ten Year	3,550
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Held-to-Maturity, Less Than One Year, Nominal Yield (in hundredths)	4.38%	[2]
Held-to-Maturity, One to Five Years, Nominal Yield (in hundredths)	3.91%	[2]
Held-to-Maturity, Six to Ten Years, Nominal Yield (in hundredths)	4.79%	[2]
Held-to-Maturity, Over Ten Year, Nominal Yield (in hundredths)	6.49%	[2]
Held-to-Maturity, Nominal Yield (in hundredths)	4.26%	[2]
Other Debt Obligations [Member]
Held-to-Maturity, Amortized Cost [Abstract]
Held-to-Maturity, Amortized Cost,Less Than One Year	9,553
Held-to-Maturity, Amortized Cost,One to Five Years	31,148
Held-to-Maturity, Amortized Cost,Six to Ten Years	28,970
Held-to-Maturity, Amortized Cost,Over Ten Year	114,293
Held-to-Maturity, Amortized Cost, Weighted Average Maturity (in years)	9.70	[1]
Held-to-Maturity, Fair Value [Abstract]
Held-to-Maturity, Fair Value, Less Than One Year	9,612
Held-to-Maturity, Fair Value, One to Five Years	32,223
Held-to-Maturity, Fair Value, Six to Ten Years	31,160
Held-to-Maturity, Fair Value, Over Ten Year	131,800
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Held-to-Maturity, Less Than One Year, Nominal Yield (in hundredths)	4.02%
Held-to-Maturity, One to Five Years, Nominal Yield (in hundredths)	5.25%
Held-to-Maturity, Six to Ten Years, Nominal Yield (in hundredths)	5.58%
Held-to-Maturity, Over Ten Year, Nominal Yield (in hundredths)	6.21%
Held-to-Maturity, Nominal Yield (in hundredths)	5.83%
Fixed Maturities Securities [Member]
Held-to-Maturity, Amortized Cost [Abstract]
Held-to-Maturity, Amortized Cost,Less Than One Year	46,367
Held-to-Maturity, Amortized Cost,One to Five Years	96,029
Held-to-Maturity, Amortized Cost,Six to Ten Years	50,132
Held-to-Maturity, Amortized Cost,Over Ten Year	117,604
Held-to-Maturity, Amortized Cost, Weighted Average Maturity (in years)	6.94	[1]
Held-to-Maturity, Fair Value [Abstract]
Held-to-Maturity, Fair Value, Less Than One Year	46,783
Held-to-Maturity, Fair Value, One to Five Years	99,354
Held-to-Maturity, Fair Value, Six to Ten Years	53,616
Held-to-Maturity, Fair Value, Over Ten Year	135,350
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Held-to-Maturity, Less Than One Year, Nominal Yield (in hundredths)	4.31%
Held-to-Maturity, One to Five Years, Nominal Yield (in hundredths)	4.34%
Held-to-Maturity, Six to Ten Years, Nominal Yield (in hundredths)	5.25%
Held-to-Maturity, Over Ten Year, Nominal Yield (in hundredths)	6.22%
Held-to-Maturity, Nominal Yield (in hundredths)	5.19%
Residential Mortgage Backed Securities [Member]
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Held-to-Maturity, Nominal Yield (in hundredths)	2.71%
Held-to-maturity Securities [Member] | Municipal and Other Tax Exempt Securities [Member]
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Effective tax rate for nominal yield calculation	39.00%
Held-to-maturity Securities [Member] | Residential Mortgage Backed Securities [Member]
Held-to-Maturity, Nominal Yield (in hundredths) [Abstract]
Average Expected Life of Mortgage Backed Security	3.8

[1] Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.

[2] Calculated on a taxable equivalent basis using a 39% effective tax rate.