Loans Receivable and Allowance for Credit Losses (Non-PCI TDR Modifications) (Details) - Non-PCI Loans $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	$ 6,419
Principal
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	1,505
Principal and Interest
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	4,914
Commercial lending
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	6,419
Commercial lending | Commercial and industrial (“C&I”)
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	4,914
Commercial lending | Commercial and industrial (“C&I”) | Principal
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	0
Commercial lending | Commercial and industrial (“C&I”) | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	4,914
Commercial lending | Commercial real estate (“CRE”)
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	1,505
Commercial lending | Commercial real estate (“CRE”) | Principal
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	1,505
Commercial lending | Commercial real estate (“CRE”) | Principal and Interest
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	0
Commercial lending | Construction and land
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	$ 0