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Quarterly Financial Data - Unaudited (Tables) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data |
| Three Months Ended
(In Thousands, Except Per Share Data) | December 31, |  | September 30, |  | June 30, |  | March 31,
2015 |  |  |  |  |  |  |
Operating results: |  |  |  |  |  |  |
Interest income (1) | $ | 68,829 |  |  | $ | 63,484 |  |  | $ | 63,373 |  |  | $ | 63,746 |
Interest expense | (25,039 | ) |  | (23,875 | ) |  | (23,008 | ) |  | (23,961 | )
Net interest income | 43,790 |  |  | 39,609 |  |  | 40,365 |  |  | 39,785 |
Non-interest income (loss) | 19,593 |  |  | (3,412 | ) |  | 14,104 |  |  | (5,031 | )
Operating expenses | (22,638 | ) |  | (24,497 | ) |  | (25,218 | ) |  | (25,063 | )
Net income | 41,059 |  |  | 19,164 |  |  | 27,064 |  |  | 14,801 |
Per share data: |  |  |  |  |  |  |
Net income – basic | $ | 0.49 |  |  | $ | 0.22 |  |  | $ | 0.31 |  |  | $ | 0.17 |
Net income – diluted | 0.46 |  |  | 0.22 |  |  | 0.31 |  |  | 0.16 |
Regular dividends declared per common share | 0.28 |  |  | 0.28 |  |  | 0.28 |  |  | 0.28 |
2014 |  |  |  |  |  |  |
Operating results: |  |  |  |  |  |  |
Interest income | $ | 65,251 |  |  | $ | 63,351 |  |  | $ | 57,993 |  |  | $ | 55,475 |
Interest expense | (23,903 | ) |  | (23,350 | ) |  | (21,151 | ) |  | (19,059 | )
Net interest income | 41,348 |  |  | 40,001 |  |  | 36,842 |  |  | 36,416 |
Non-interest income | 10,686 |  |  | 28,519 |  |  | 1,475 |  |  | (4,671 | )
Operating expenses | (26,462 | ) |  | (21,406 | ) |  | (22,282 | ) |  | (19,973 | )
Net income | 27,122 |  |  | 45,097 |  |  | 16,017 |  |  | 12,333 |
Per share data: |  |  |  |  |  |  |
Net income – basic | $ | 0.32 |  |  | $ | 0.53 |  |  | $ | 0.19 |  |  | $ | 0.14 |
Net income – diluted | 0.31 |  |  | 0.50 |  |  | 0.18 |  |  | 0.14 |
Regular dividends declared per common share | 0.28 |  |  | 0.28 |  |  | 0.28 |  |  | 0.28 |
(1) | Interest income for both three-month periods ended December 31, 2015, and June 30, 2015, included $2 million of yield maintenance fees from commercial loans that prepaid during the quarters.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 + Details
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