Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain in OCI on derivatives (effective portion), net of tax	$ (287)		$ 765	$ (464)		$ 763
Loss on termination of hedge reclassified into noninterest expense, pre tax	1,121	[1]		1,121	[1]
Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain in OCI on derivatives (effective portion), net of tax	1,005		1,619	1,507		2,454
Loss reclassified from OCI into interest expense (effective portion)	1,063		1,443	2,211		2,859
Loss recognized in income on derivatives (ineffective portion & amount excluded from effectiveness testing)
Derivatives not designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Changes in fair value of customer related positions	55		1,166	43		1,293
Interest Expense [Member] | Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in income on derivatives (ineffective portion & amount excluded from effectiveness testing)
Other Income [Member] | Derivatives not designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Changes in fair value of customer related positions	15		14	44		26
Other Expense [Member] | Derivatives designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in income on derivatives (ineffective portion & amount excluded from effectiveness testing)
Other Expense [Member] | Derivatives not designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Changes in fair value of customer related positions	(1)		(56)	(2)		(81)
Mortgage Banking Income [Member] | Derivatives not designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase Decrease In Fair Value Of Unhedged Derivative Instruments Relating To Residential Loans	$ 41		$ 1,208	$ 1		$ 1,348

[1] cludes the amortization of the remaining balance of a realized but unrecognized gain, net of tax, from the termination of interest rate swaps in June 2009. The original gain of $1.4 million, net of tax, is being recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain has amortized to $643,000 and $787,000 at June 30, 2014 and 2013, respectively.