Fair Value Measurements (Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 767		$ 896		$ 887		$ 1,241
Gains and losses (realized and unrealized): included in earnings	0	[1]	(948)	[1]	(209)	[1]	(1,454)	[1]
Gains and losses (realized and unrealized): Included in other comprehensive income	163		20		252		181
Issuances	4,178		0		4,178		0
Transfers out of Level 3	0		828		0		828
Balance at end of period	5,108		796		5,108		796
Securities Available for Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	767	[2]	934	[2]	887	[2]	806	[2]
Gains and losses (realized and unrealized): Included in earnings	0	[1],[2]	(158)	[1],[2]	(209)	[1],[2]	(191)	[1],[2]
Gains and losses (realized and unrealized): Included in other comprehensive income	163	[2]	20	[2]	252	[2]	181	[2]
Issuances	0	[2]	0	[2]	0	[2]	0	[2]
Transfers out of Level 3	0	[2]	0	[2]	0	[2]	0	[2]
Balance at end of period	930	[2]	796	[2]	930	[2]	796	[2]
Mortgage loans held for sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	0	[2]			0	[3]
Gains and losses (realized and unrealized): Included in earnings	0	[1],[2]			0	[1],[3]
Gains and losses (realized and unrealized): Included in other comprehensive income	0	[2]			0	[3]
Issuances	4,233	[2]			4,233	[3]
Transfers out of Level 3	0	[2]			0	[3]
Balance at end of period	4,233	[2],[3]			4,233	[2],[3]
Derivative Assets / Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	0	[4]	(38)	[4]	0	[4]	435	[4]
Gains and losses (realized and unrealized): included in earnings	0	[1],[4]	(790)	[1],[4]	0	[1],[4]	(1,263)	[1],[4]
Gains and losses (realized and unrealized): Included in other comprehensive income	0	[4]	0	[4]	0	[4]	0	[4]
Issuances	(55)	[2]	0	[2]	(55)	[4]	0	[4]
Transfers out of Level 3	0	[2]	828	[2]	0	[4]	828	[4]
Balance at end of period	$ (55)	[4]	$ 0	[4]	$ (55)	[4]	$ 0	[4]

[1] Losses included in earnings for Level 3 securities available for sale consisted of credit-related impairment losses on two Level 3 pooled trust preferred debt securities. No credit-related impairment losses were recognized during the three months ended September 30, 2012, while credit-related impairment losses of $158 thousand were recognized during the three months ended September 30, 2011. Credit-related impairment losses of $209 thousand and $191 thousand, respectively, were recognized during the nine months ended September 30, 2012 and 2011. The losses included in earnings for Level 3 derivative assets and liabilities, which were comprised of forward loan commitments (interest rate lock commitments and commitments to sell fixed-rate residential real estate mortgages), were included in net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.

[2] During the periods indicated, Level 3 securities available for sale were comprised of two pooled trust preferred debt securities in the form of collateralized debt obligations.

[3] During the periods indicated, Level 3 mortgage loans held for sale consisted of certain mortgage loans whose fair value was determined utilizing a discounted cash flow analysis.(3

[4] During the three and nine months ended September 30, 2012, Level 3 derivative assets / liabilities consisted of forward loan commitments (interest rate lock commitments and commitments to sell fixed-rate residential real estate mortgages) whose fair value was determined utilizing a discounted cash flows analysis. During the three and nine months ended September 30, 2011, Level 3 derivative assets / liabilities consisted of certain forward loan commitments that were reclassified out of Level 3 into Level 2 after evaluation during the third quarter of 2011, when it was determined that significant inputs and significant value drivers were observable in active markets.