Investment Securities (Tables)

9 Months Ended

Sep. 30, 2012

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

Available-For-Sale Securities
	U.S. Agency Obligations		State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Mutual Funds and Equity Securities		Total Available- For-Sale Securities
September 30, 2012
Available-For-Sale Securities,   at Amortized Cost	$	56,054	$	62,706	$	292,716	$	1,000	$	1,120	$	413,596
Available-For-Sale Securities,   at Fair Value	56,391		62,965		304,085		800		1,175		425,416
Gross Unrealized Gains	337		285		11,549		—		55		12,226
Gross Unrealized Losses	—		26		180		200		—		406
Available-For-Sale Securities,   Pledged as Collateral											276,357
Maturities of Debt Securities, at Amortized Cost:
Within One Year	31,007		15,777		21,841		—				68,625
From 1 - 5 Years	25,047		43,969		253,650		—				322,666
From 5 - 10 Years	—		1,343		17,225		—				18,568
Over 10 Years	—		1,617		—		1,000				2,617
Maturities of Debt Securities, at Fair Value:
Within One Year	31,012		15,818		22,494		—				69,324
From 1 - 5 Years	25,379		44,131		263,126		—				332,636
From 5 - 10 Years	—		1,399		18,465		—				19,864
Over 10 Years	—		1,617		—		800				2,417
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	4,999	$	17,432	$	18,825	$	800	$	—	$	42,056
12 Months or Longer	—		—		—		—		—		—
Total	$	4,999	$	17,432	$	18,825	$	800	$	—	$	42,056
Number of Securities in a   Continuous Loss Position	1		73		7		1				82
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	—	$	26	$	180	$	200	$	—	$	406
12 Months or Longer	—		—		—		—		—		—
Total	$	—	$	26	$	180	$	200	$	—	$	406

Available-For-Sale Securities
	U.S. Agency Obligations		State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Mutual Funds and Equity Securities		Total Available- For-Sale Securities
December 31, 2011
Available-For-Sale Securities,   at Amortized Cost	$	116,055	$	44,712	$	382,118	$	1,015	$	1,365	$	545,265
Available-For-Sale Securities,   at Fair Value	116,393		44,999		392,712		1,015		1,419		556,538
Gross Unrealized Gains	342		305		10,813		—		69		11,529
Gross Unrealized Losses	4		18		219		—		15		256
Available-For-Sale Securities,   Pledged as Collateral											291,147
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	25,956	$	4,505	$	9,857	$	—	$	—	$	40,318
12 Months or Longer	—		—		5,715		—		78		5,793
Total	$	25,956	$	4,505	$	15,572	$	—	$	78	$	46,111
Number of Securities in a   Continuous Loss Position	7		12		5		—		2		26
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	4	$	18	$	204	$	—	$	—	$	226
12 Months or Longer	—		—		15		—		15		30
Total	$	4	$	18	$	219	$	—	$	15	$	256
September 30, 2011
Available-For-Sale Securities,   at Amortized Cost	$	43,058	$	48,564	$	366,485	$	1,330	$	1,365	$	460,802
Available-For-Sale Securities,   at Fair Value	43,416		48,850		377,375		1,318		1,381		472,340
Gross Unrealized Gains	358		286		11,156		—		41		11,841
Gross Unrealized Losses	—		—		266		12		25		303
Available-For-Sale Securities,   Pledged as Collateral											344,341
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	—	$	257	$	17,637	$	—	$	148	$	18,042
12 Months or Longer	—		—		4,390		317		—		4,707
Total	$	—	$	257	$	22,027	$	317	$	148	$	22,749
Number of Securities in a   Continuous Loss Position	—		1		10		1		4		16
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	—	$	—	$	251	$	—	$	25	$	276
12 Months or Longer	—		—		15		12		—		27
Total	$	—	$	—	$	266	$	12	$	25	$	303

Held-to-maturity Securities [Table Text Block]

Held-To-Maturity Securities
	State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Total Held-To Maturity Securities
September 30, 2012
Held-To-Maturity Securities,   at Amortized Cost	$	179,412	$	64,537	$	1,000	$	244,949
Held-To-Maturity Securities,   at Fair Value	188,127		65,809		1,000		254,936
Gross Unrealized Gains	8,718		1,272		—		9,990
Gross Unrealized Losses	3		—		—		3
Held-To-Maturity Securities,   Pledged as Collateral							244,949
Maturities of Debt Securities, at Amortized Cost:
Within One Year	31,578		—		—		31,578
From 1 - 5 Years	86,409		64,537		—		150,946
From 5 - 10 Years	56,959		—		—		56,959
Over 10 Years	4,466		—		1,000		5,466
Maturities of Debt Securities, at Fair Value:
Within One Year	31,664		—		—		31,664
From 1 - 5 Years	89,124		65,809		—		154,933
From 5 - 10 Years	62,578		—		—		62,578
Over 10 Years	4,761		—		1,000		5,761
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	3,165	$	—	$	—	$	3,165
12 Months or Longer	—		—		—		—
Total	$	3,165	$	—	$	—	$	3,165
Number of Securities in a   Continuous Loss Position	9		—		—		9
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	3	$	—	$	—	$	3
12 Months or Longer	—		—		—		—
Total	$	3	$	—	$	—	$	3

Held-To-Maturity Securities
	State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Total Held-To Maturity Securities
December 31, 2011
Held-To-Maturity Securities,   at Amortized Cost	$	149,688	$	—	$	1,000	$	150,688
Held-To-Maturity Securities,   at Fair Value	158,059		—		1,000		159,059
Gross Unrealized Gains	8,378		—		—		8,378
Gross Unrealized Losses	7		—		—		7
Held-To-Maturity Securities,   Pledged as Collateral							150,688
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	510	$	—	$	—	$	510
12 Months or Longer	—		—		—		—
Total	$	510	$	—	$	—	$	510
Number of Securities in a   Continuous Loss Position	1		—		—		1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	7	$	—	$	—	$	7
12 Months or Longer	—		—		—		—
Total	$	7	$	—	$	—	$	7
September 30, 2011
Held-To-Maturity Securities,   at Amortized Cost	$	145,416	$	—	$	1,000	$	146,416
Held-To-Maturity Securities,   at Fair Value	152,131		—		1,000		153,131
Gross Unrealized Gains	6,715		—		—		6,715
Gross Unrealized Losses	—		—		—		—
Held-To-Maturity Securities,   Pledged as Collateral							146,416
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	—	$	—	$	—	$	—
12 Months or Longer	—		—		—		—
Total	$	—	$	—	$	—	$	—
Number of Securities in a   Continuous Loss Position	—		—		—		—
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	—	$	—	$	—	$	—
12 Months or Longer	—		—		—		—
Total	$	—	$	—	$	—	$	—

In