acquisition date is recognized as interest income over the life of the loan using an effective interest method for non­revolving credits or a straight­line method, which approximates the effective interest method, for revolving credits. Any unrecognized discount for a loan that is subsequently repaid in full will be recognized immediately into income.

Loans are generally recorded at the unpaid principal balance, net of premiums, unearned discounts and net deferred loan origination fees and costs. The premiums and unearned discounts may include values determined in purchase accounting. Interest on loans is calculated using the simple interest method based on the daily balance of the principal amount outstanding and is credited to income as earned. Loans are considered past due or delinquent when principal or interest payments are past due 30 days or more.

# Covered Loans:

Purchased loans subject to FDIC shared­loss agreements were historically identified as “covered” on the Consolidated Financial Statements. The FDIC shared­loss agreements were terminated during the year ended December 31, 2015 and as such the covered designation was removed. For further information see Note (5) FDIC Indemnification Asset. The covered loans included the majority of loans from the Company's acquisition of Cowlitz Bank and certain loans from the Washington Banking Merger, which included loans from Washington Banking Company's acquisitions of City Bank and North County Bank. The same accounting principles that apply to loans receivable applied to covered loans receivable, with the added benefit of shared­loss agreements.

# Delinquent Loans:

Delinquencies in the commercial business loan portfolio are handled by the assigned loan officer. Loan officers are responsible for collecting loans they originate or which are assigned to them. The Bank sends a borrower a delinquency notice 15 days after the due date when the borrower fails to make a required payment on a loan. If the delinquency is not brought current, additional delinquency notices are mailed at 30 and 45 days for commercial loans. Additional written and oral contacts are made with the borrower between 60 and 90 days after the due date.

If a real estate loan payment is past due for 45 days or more, the collection manager may perform a review of the condition of the property. Depending on the nature of the loan and the type of collateral securing the loan, the Bank may negotiate and accept a modified payment program with the borrower, accept a voluntary deed in lieu of foreclosure or, when considered necessary, begin foreclosure proceedings. If foreclosed on, real property is generally sold at a public sale and the Bank may bid on the property to protect its interest. A decision as to whether and when to begin foreclosure proceedings is based on such factors as the amount of the outstanding loan relative to the value of the property securing the original indebtedness, the extent of the delinquency, and the borrower’s ability and willingness to cooperate in resolving the delinquency.

# Nonaccrual Loans:

The Company's policies for placing loans on nonaccrual status, recording payments received on nonaccrual loans, resuming accrual of interest, determining past due or delinquency status and charging off uncollectible loans generally do not differ by loan segments or classes.

Loans on which the accrual of interest has been discontinued are designated as nonaccrual loans. Delinquent loans may remain on accrual status between 30 days and 89 days past due. The accrual of interest is generally discontinued at the time the loan is 90 days delinquent unless the credit is well secured and in the process of collection. Loans are placed on nonaccrual at an earlier date if collection of the contractual principal or interest is doubtful. All interest accrued but not collected on loans deemed nonaccrual during the period is reversed against interest income in that period. The interest payments received on nonaccrual loans are generally accounted for on the cost­recovery method whereby the interest payment is applied to the principal balances. Loans may be returned to accrual status when improvements in credit quality eliminate the doubt as to the full collectability of both interest and principal and a period of sustained performance has occurred. Substantially all loans that are nonaccrual are also considered impaired. Income recognition on impaired loans conforms to that used on nonaccrual loans.

Loans are generally charged­off if collection of the contractual principal or interest as scheduled in the loan agreement is doubtful. Credit card loans and other consumer loans are typically charged­off no later than 180 days past due.