Allowance for Loan Losses Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of the Post-Modification Balance of Loans Restructured) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 Loan		Dec. 31, 2011 Loan		Dec. 31, 2010 Loan
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	75	[1],[2],[3]	123	[1],[2],[3]	113	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 72,512	[1],[2],[3]	$ 100,528	[1],[2],[3]	$ 97,900	[1],[2],[3]
Residential Real Estate and Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	10	[1],[2],[3]	16	[1],[2],[3]	4	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,638	[1],[2],[3]	5,916	[1],[2],[3]	3,269	[1],[2],[3]
Commercial and Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	18	[1],[2],[3]	24	[1],[2],[3]	36	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	14,311	[1],[2],[3]	6,956	[1],[2],[3]	14,916	[1],[2],[3]
Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	[1],[2],[3]	1	[1],[2],[3]	8	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,147	[1],[2],[3]	1,105	[1],[2],[3]	8,503	[1],[2],[3]
Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	[1],[2],[3]	8	[1],[2],[3]	3	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	622	[1],[2],[3]	12,140	[1],[2],[3]	2,005	[1],[2],[3]
Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	17	[1],[2],[3]	7	[1],[2],[3]	12	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	31,836	[1],[2],[3]	7,971	[1],[2],[3]	18,454	[1],[2],[3]
Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1],[2],[3]	9	[1],[2],[3]	7	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1],[2],[3]	8,870	[1],[2],[3]	11,164	[1],[2],[3]
Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1],[2],[3]	5	[1],[2],[3]	3	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	727	[1],[2],[3]	5,334	[1],[2],[3]	3,386	[1],[2],[3]
Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	[1],[2],[3]	14	[1],[2],[3]	11	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	13,518	[1],[2],[3]	19,113	[1],[2],[3]	10,746	[1],[2],[3]
Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1],[2],[3]	6	[1],[2],[3]	9	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	380	[1],[2],[3]	4,415	[1],[2],[3]	8,808	[1],[2],[3]
Mixed Use and Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	15	[1],[2],[3]	33	[1],[2],[3]	20	[1],[2],[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment	7,333	[1],[2],[3]	28,708	[1],[2],[3]	16,649	[1],[2],[3]
Modification to Interest- Only Payments [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	41	[1]	39	[1]	57	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	56,383	[1]	26,474	[1]	47,233	[1]
Modification to Interest- Only Payments [Member] | Residential Real Estate and Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	[1]	4	[1]	2	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	924	[1]	1,390	[1]	1,334	[1]
Modification to Interest- Only Payments [Member] | Commercial and Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	7	[1]	13	[1]	15	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	10,579	[1]	3,780	[1]	5,151	[1]
Modification to Interest- Only Payments [Member] | Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	1	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	496	[1]	1,105	[1]	0	[1]
Modification to Interest- Only Payments [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	[1]	1	[1]	1	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	622	[1]	467	[1]	377	[1]
Modification to Interest- Only Payments [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	13	[1]	0	[1]	6	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	26,511	[1]	0	[1]	5,471	[1]
Modification to Interest- Only Payments [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	3	[1]	5	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	4,292	[1]	7,918	[1]
Modification to Interest- Only Payments [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	2	[1]	2	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	2,181	[1]	686	[1]
Modification to Interest- Only Payments [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	6	[1]	5	[1]	8	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	12,897	[1]	5,191	[1]	8,138	[1]
Modification to Interest- Only Payments [Member] | Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	0	[1]	6	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	380	[1]	0	[1]	6,164	[1]
Modification to Interest- Only Payments [Member] | Mixed Use and Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	[1]	10	[1]	12	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	3,974	[1]	8,068	[1]	11,994	[1]
Reduction of Interest Rate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	53	[1]	80	[1]	54	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	62,241	[1]	60,858	[1]	51,459	[1]
Reduction of Interest Rate [Member] | Residential Real Estate and Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	6	[1]	13	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	631	[1]	5,262	[1]	1,569	[1]
Reduction of Interest Rate [Member] | Commercial and Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	11	[1]	14	[1]	10	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	13,691	[1]	1,933	[1]	4,795	[1]
Reduction of Interest Rate [Member] | Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	0	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	496	[1]	0	[1]	4,863	[1]
Reduction of Interest Rate [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	[1]	3	[1]	1	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	622	[1]	9,402	[1]	377	[1]
Reduction of Interest Rate [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	14	[1]	2	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	30,561	[1]	2,981	[1]	5,276	[1]
Reduction of Interest Rate [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	6	[1]	5	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	4,036	[1]	7,936	[1]
Reduction of Interest Rate [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	4	[1]	2	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	727	[1]	3,494	[1]	3,149	[1]
Reduction of Interest Rate [Member] | Retail [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	6	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,865	[1]
Reduction of Interest Rate [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts			5	[1]	7	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment			3,963	[1]	6,811	[1]
Reduction of Interest Rate [Member] | Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	5	[1]	5	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	380	[1]	3,866	[1]	5,735	[1]
Reduction of Interest Rate [Member] | Mixed Use and Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	11	[1]	28	[1]	15	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	6,268	[1]	25,921	[1]	10,948	[1]
Extension at Below Market Terms [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	59	[1]	82	[1]	77	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	58,612	[1]	71,633	[1]	60,644	[1]
Extension at Below Market Terms [Member] | Residential Real Estate and Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	[1]	7	[1]	2	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,390	[1]	2,326	[1]	2,591	[1]
Extension at Below Market Terms [Member] | Commercial and Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	11	[1]	11	[1]	31	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	3,603	[1]	2,273	[1]	12,468	[1]
Extension at Below Market Terms [Member] | Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	[1]	1	[1]	6	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,147	[1]	1,105	[1]	6,760	[1]
Extension at Below Market Terms [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	[1]	7	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	622	[1]	11,673	[1]	2,005	[1]
Extension at Below Market Terms [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	17	[1]	7	[1]	11	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	31,836	[1]	7,971	[1]	18,359	[1]
Extension at Below Market Terms [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	6	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	4,780	[1]	3,304	[1]
Extension at Below Market Terms [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	5	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	727	[1]	5,334	[1]	3,386	[1]
Extension at Below Market Terms [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	[1]	11	[1]	4	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	13,518	[1]	16,981	[1]	3,186	[1]
Extension at Below Market Terms [Member] | Multi-Family [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts		[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment		[1]
Extension at Below Market Terms [Member] | Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts			6	[1]	7	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment			4,415	[1]	4,191	[1]
Extension at Below Market Terms [Member] | Mixed Use and Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	9	[1]	21	[1]	7	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,769	[1]	14,775	[1]	4,394	[1]
Forgiveness of Debt [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	4	[1]	2	[1]	7	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,340	[1]	135	[1]	5,687	[1]
Forgiveness of Debt [Member] | Residential Real Estate and Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	29	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Commercial and Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	[1]	2	[1]	1	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,311	[1]	135	[1]	1,050	[1]
Forgiveness of Debt [Member] | Residential Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	2	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	1,743	[1]
Forgiveness of Debt [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	0	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]
Forgiveness of Debt [Member] | Multi-Family [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	3	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	2,644	[1]
Forgiveness of Debt [Member] | Mixed Use and Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	[1]	0	[1]	1	[1]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	[1]	$ 0	[1]	$ 250	[1]

[1] Balances represent the recorded investment in the loan at the time of the restructuring.

[2] Restructured loans may have more than one modification at the time of the restructuring. As such, restructured loans during the period may be represented in more than one of the categories noted above.

[3] Total restructured loans represent all loans restructured during the previous twelve months from the date indicated.