XML 34 R75.htm IDEA: XBRL DOCUMENT v2.4.1.9
DEPOSITS AND CUSTOMER REPURCHASE AGREEMENTS (Geographic Concentration of Deposits) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Deposit Liabilities [Line Items]    
Total deposits $ 4,319,417us-gaap_DepositsDomestic $ 3,898,950us-gaap_DepositsDomestic
Percent of total deposits 100.00%banr_PecentageOfDomesticDepositsToDeposits 100.00%banr_PecentageOfDomesticDepositsToDeposits
Washington [Member]    
Deposit Liabilities [Line Items]    
Total deposits 2,865,536us-gaap_DepositsDomestic
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Percent of total deposits 66.30%banr_PecentageOfDomesticDepositsToDeposits
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Oregon [Member]    
Deposit Liabilities [Line Items]    
Total deposits 1,206,944us-gaap_DepositsDomestic
/ us-gaap_StatementGeographicalAxis
= stpr_OR		  
Percent of total deposits 28.00%banr_PecentageOfDomesticDepositsToDeposits
/ us-gaap_StatementGeographicalAxis
= stpr_OR		  
Idaho [Member]    
Deposit Liabilities [Line Items]    
Total deposits $ 246,937us-gaap_DepositsDomestic
/ us-gaap_StatementGeographicalAxis
= stpr_ID		  
Percent of total deposits 5.70%banr_PecentageOfDomesticDepositsToDeposits
/ us-gaap_StatementGeographicalAxis
= stpr_ID