Loans and Allowance for Credit Losses Loans and Allowance for Credit Losses (Schedule of Average Recorded Investment in Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	$ 148,235	$ 136,226
1-4 single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	4,685	4,639
US Government Agency Insured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	19,865	10,885
Residential and Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	24,550	15,524
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	21,370	23,955
Commercial real estate, Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	11,938	10,628
Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	6,188	7,854
Commercial real estate, Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	3,406	3,526
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	27,297	27,879
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	$ 123,685	$ 120,702