Loans and Allowance for Loan and Lease Losses Loans and Allowance for Loan and Lease Losses (Schedule of Average Recorded Investment in Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Document Fiscal Year Focus			2018
Average recorded investment in impaired loans	$ 186,557	$ 221,657	$ 180,447	$ 206,900
1-4 single family residential | Non-ACI Loans, Covered [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	1,906	2,304	2,164	2,369
1-4 single family residential | Non-Covered [Domain]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	5,745	962	4,228	800
Home equity loans and lines of credit | ACI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans		5,200		4,200
Home equity loans and lines of credit | Non-ACI Loans, Covered [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	0	9,533	0	9,638
Home equity loans and lines of credit | Non-Covered [Domain]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	0	0	0	0
Residential and Other Consumer | Non-ACI Loans, Covered [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	1,906	11,837	2,164	12,007
Residential and Other Consumer | Non-Covered [Domain]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	5,745	962	4,228	800
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	26,041	1,359	25,674	1,816
Commercial real estate, Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	14,577	8,216	13,858	4,056
Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	7,766	2,797	5,386	3,317
Commercial real estate, Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	14,004	20,579	17,451	18,872
Taxi medallion [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	83,683	123,867	92,893	107,529
Other Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	22,179	42,479	15,559	43,308
Commercial Lending Subsidiaries
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	12,562	21,398	5,398	27,202
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	$ 180,812	$ 220,695	$ 176,219	$ 206,100