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Fair value measurements (Details 2) (USD $) | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Financial liabilities |  |
Short-term borrowings-other than bank | $ 125,786,000 | $ 83,693,000
Other bank borrowings | 187,884,000 | 195,926,000
Carrying or notional amount |  |
Financial assets |  |
Money market funds | 10,000 | 10,000
Available-for-sale investment and mortgage-related securities | 560,172,000 | 671,358,000
Investment in stock of Federal Home Loan Bank of Seattle | 94,281,000 | 96,022,000
Loans receivable, net | 3,946,703,000 | 3,763,238,000
Derivative assets | 54,192,000 |
Financial liabilities |  |
Deposit liabilities | 4,276,243,000 | 4,229,916,000
Short-term borrowings-other than bank | 125,786,000 | 83,693,000
Other bank borrowings | 187,884,000 | 195,926,000
Long-term debt, net-other than bank | 1,422,877,000 | 1,422,872,000
Derivative liabilities | 19,350,000 |
Carrying or notional amount | American Savings Bank (ASB) |  |
Financial liabilities |  |
Loan commitments and unused lines and letters of credit | 1,600,000,000 | 1,500,000,000
Notional amount of loans serviced | 1,300,000,000 | 1,300,000,000
Estimated fair value |  |
Financial assets |  |
Money market funds | 10,000 | 10,000
Available-for-sale investment and mortgage-related securities | 560,172,000 | 671,358,000
Investment in stock of Federal Home Loan Bank of Seattle | 94,281,000 | 96,022,000
Loans receivable, net | 4,075,387,000 | 3,957,752,000
Derivative assets | 1,163,000 |
Financial liabilities |  |
Deposit liabilities | 4,279,284,000 | 4,235,527,000
Short-term borrowings-other than bank | 125,786,000 | 83,693,000
Other bank borrowings | 200,813,000 | 212,163,000
Long-term debt, net-other than bank | 1,450,844,000 | 1,481,004,000
Derivative liabilities | 525,000 |
Estimated fair value | Level 1 |  |
Financial assets |  |
Derivative assets | 625,000 |
Estimated fair value | Level 2 |  |
Financial assets |  |
Money market funds | 10,000 | 10,000
Available-for-sale investment and mortgage-related securities | 560,172,000 | 671,358,000
Investment in stock of Federal Home Loan Bank of Seattle | 94,281,000 | 96,022,000
Derivative assets | 538,000 |
Financial liabilities |  |
Deposit liabilities | 4,279,284,000 | 4,235,527,000
Short-term borrowings-other than bank | 125,786,000 | 83,693,000
Other bank borrowings | 200,813,000 | 212,163,000
Long-term debt, net-other than bank | 1,450,844,000 | 1,481,004,000
Derivative liabilities | 525,000 |
Estimated fair value | Level 3 |  |
Financial assets |  |
Loans receivable, net | 4,075,387,000 | 3,957,752,000
Estimated fair value | American Savings Bank (ASB) |  |
Financial liabilities |  |
Loan commitments and unused lines and letters of credit | 100,000 | 1,200,000
Servicing rights on loans | $ 14,000,000 | $ 11,900,000

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