Fair Value (Unobservable Inputs Reconciliation) (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 and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other-than-temporary impairment included in earnings	$ (25)	$ (200)	$ (29)	$ (581)
Other-than-temporary impairment (included in) transferred from other comprehensive income	(25)	(71)	(21)	(214)
Collateralized Debt Obligations | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	850	946	819	934
Other-than-temporary impairment included in earnings	(25)	(200)	(29)	(581)
Other-than-temporary impairment (included in) transferred from other comprehensive income	25	71	21	214
Other gains/losses included in other comprehensive income	5	(87)	44	163
Net swap settlement recorded	0	0	0	0
Ending balance	855	730	855	730
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	(25)	(200)	(29)	(581)
Collateralized Debt Obligations | IRLC and FSA | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
IRLC and FSA issuances	0	0	0	0
IRLC and FSA expirations and fair value changes included in earnings	0	0	0	0
IRLC transfers into closed loans/FSA transferred on sales	0	0	0	0
Mortgage Derivatives | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	272	34	(22)	218
Other-than-temporary impairment included in earnings	0	0	0	0
Other-than-temporary impairment (included in) transferred from other comprehensive income	0	0	0	0
Other gains/losses included in other comprehensive income	0	0	0	0
Net swap settlement recorded	0	0	0	0
Ending balance	361	131	361	131
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	0	0	0	0
Mortgage Derivatives | IRLC and FSA | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
IRLC and FSA issuances	767	171	862	377
IRLC and FSA expirations and fair value changes included in earnings	(441)	81	(391)	(146)
IRLC transfers into closed loans/FSA transferred on sales	(237)	(155)	(88)	(318)
Interest Rate Swap | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(2,349)	103	(1,834)	817
Other-than-temporary impairment included in earnings	0	0	0	0
Other-than-temporary impairment (included in) transferred from other comprehensive income	0	0	0	0
Other gains/losses included in other comprehensive income	(457)	(2,001)	(1,269)	(2,908)
Net swap settlement recorded	153	169	450	362
Ending balance	(2,653)	(1,729)	(2,653)	(1,729)
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	(153)	(169)	(450)	(362)
Interest Rate Swap | IRLC and FSA | Significant Unobservable Inputs (Level 3) | Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
IRLC and FSA issuances	0	0	0	0
IRLC and FSA expirations and fair value changes included in earnings	0	0	0	0
IRLC transfers into closed loans/FSA transferred on sales	$ 0	$ 0	$ 0	$ 0