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Bank subsidiary (Details 15) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Deposit liabilities |  |  |
Savings | $ 1,684,875,000 | $ 1,623,211,000 |
Other checking |  |  |
Interest-bearing | 610,542,000 | 589,228,000 |
Noninterest-bearing | 538,214,000 | 473,297,000 |
Commercial checking | 455,614,000 | 392,345,000 |
Money market | 236,641,000 | 230,990,000 |
Term certificates | 544,146,000 | 666,301,000 |
Total Amount | 4,070,032,000 | 3,975,372,000 |
Weighted-average stated rate |  |  |
Savings (as a percent) | 0.07% | 0.12% |
Other checking, interest bearing (as a percent) | 0.02% | 0.05% |
Money market (as a percent) | 0.21% | 0.28% |
Term certificates (as a percent) | 0.98% | 1.25% |
Total weighted-average stated rate (as a percent) | 0.18% | 0.28% |
Certificate accounts of $100,000 or more | 119,000,000 | 153,000,000 |
Term certificates outstanding, scheduled maturities |  |  |
2012 | 325,000,000 |  |
2013 | 79,000,000 |  |
2014 | 45,000,000 |  |
2015 | 56,000,000 |  |
2016 | 26,000,000 |  |
Thereafter | 13,000,000 |  |
Interest expense on deposit liabilities by type of deposit |  |  |
Term certificates | 6,393,000 | 11,221,000 | 27,369,000
Savings | 1,756,000 | 2,262,000 | 4,952,000
Money market | 650,000 | 884,000 | 886,000
Interest-bearing checking | 184,000 | 329,000 | 839,000
Interest expense on deposit liabilities | $ 8,983,000 | $ 14,696,000 | $ 34,046,000

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