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Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Jan. 01, 2014 | Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  | $ 568,356 | $ 694,535 |  |  |
Operating income |  | 69,506 | 89,214 |  |  |
Income taxes |  | 19,979 | 25,721 |  |  |
Net income for common stock |  | 31,866 | 45,787 |  |  |
Other |  | 481,531 |  | $ 542,523 |  |
Liabilities and Equity |  | 11,273,447 |  | 11,185,142 |  |
Liabilities |  | 9,341,245 |  | 9,360,276 |  |
Retained earnings |  | 296,680 |  | 296,654 |  |
Common stock equity |  | 1,897,909 | 1,745,124 | 1,790,573 |  | $ 1,726,406
Net income | [1] | 32,339 | 46,260 |  |  |
Increase in deferred income taxes | [1] | 3,828 | 6,457 |  |  |
Change in other assets and liabilities | [1] | (25,992) | (29,931) |  |  |
American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  | $ 700 |
Amortization Method Qualified Affordable Housing Project Investments, Amortization |  | 1,300 |  |  |  |
Affordable Housing Tax Credit, Amount |  | 1,400 |  |  |  |
Affordable Housing Tax Credit, Other Tax Benefits, Amount |  | 500 |  |  |  |
Income taxes |  | 7,156 | 8,133 |  |  |
Other |  | 305,917 |  | 305,416 |  |
Liabilities |  | 5,181,271 |  | 5,032,434 |  |
Retained earnings |  | 217,909 |  | 211,934 |  |
Common stock equity |  | 543,606 |  | 533,788 |  |
Net income |  | 13,475 | 14,399 |  |  |
Scenario, Previously Reported |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 24,673 |  |  |
Net income for common stock |  |  | 45,927 |  |  |
Other |  |  |  | 541,542 |  |
Liabilities and Equity |  |  |  | 11,184,161 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 631,734 |  |
Liabilities |  |  |  | 9,358,440 |  |
Retained earnings |  |  |  | 297,509 |  | 255,694
Common stock equity |  |  |  | 1,791,428 |  | 1,727,070
Net income |  |  | 46,400 |  |  |
Increase in deferred income taxes |  | 15,265 | 6,298 |  |  |
Change in other assets and liabilities |  | 19,826 | (27,208) |  |  |
Scenario, Previously Reported | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 7,085 |  |  |
Net income for common stock |  |  | 14,539 |  |  |
Other |  |  |  | 304,435 |  |
Liabilities and Equity |  |  |  | 5,565,241 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 116,527 |  |
Liabilities |  |  |  | 5,030,598 |  |
Retained earnings |  |  |  | 212,789 |  |
Common stock equity |  |  |  | 534,643 |  |
Restatement Adjustment | Capital Expenditure Accruals |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Change in other assets and liabilities |  |  | (2,704) |  |  |
Accounting Standards Update 2014-01 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 25,721 |  |  |
Net income for common stock |  |  | 45,787 |  |  |
Other |  |  |  | 542,523 |  |
Liabilities and Equity |  |  |  | 11,185,142 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 633,570 |  |
Liabilities |  |  |  | 9,360,276 |  |
Retained earnings |  |  |  | 296,654 |  | 255,030
Common stock equity |  |  |  | 1,790,573 |  | 1,726,406
Net income |  |  | 46,260 |  |  |
Increase in deferred income taxes |  |  | 6,457 |  |  |
Change in other assets and liabilities |  |  | (29,931) |  |  |
Accounting Standards Update 2014-01 | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 8,133 |  |  |
Net income for common stock |  |  | 14,399 |  |  |
Other |  |  |  | 305,416 |  |
Liabilities and Equity |  |  |  | 5,566,222 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 118,363 |  |
Liabilities |  |  |  | 5,032,434 |  |
Retained earnings |  |  |  | 211,934 |  |
Common stock equity |  |  |  | 533,788 |  |
Accounting Standards Update 2014-01 | Scenario, Previously Reported |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Change in other assets and liabilities |  |  | (27,227) |  |  |
Accounting Standards Update 2014-01 | Restatement Adjustment |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 1,048 |  |  |
Net income for common stock |  |  | (140) |  |  |
Other |  |  |  | 981 |  |
Liabilities and Equity |  |  |  | 981 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 1,836 |  |
Liabilities |  |  |  | 1,836 |  |
Retained earnings |  |  |  | (855) |  | (664)
Common stock equity |  |  |  | (855) |  | $ (664)
Net income |  |  | (140) |  |  |
Increase in deferred income taxes |  |  | 159 |  |  |
Change in other assets and liabilities |  |  | (19) |  |  |
Accounting Standards Update 2014-01 | Restatement Adjustment | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income taxes |  |  | 1,048 |  |  |
Net income for common stock |  |  | (140) |  |  |
Other |  |  |  | 981 |  |
Liabilities and Equity |  |  |  | 981 |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  |  | 1,836 |  |
Liabilities |  |  |  | 1,836 |  |
Retained earnings |  |  |  | (855) |  |
Common stock equity |  |  |  | (855) |  |
Bank |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  | 43,717 | 41,088 |  |  |
Operating income |  | 20,631 | 22,531 |  |  |
Income taxes |  | 7,156 | 8,133 |  |  |
Net income for common stock |  | 13,475 | 14,399 |  |  |
Net income |  | 13,475 | 14,399 |  |  |
Bank | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Liabilities and Equity |  | $ 5,724,877 |  | $ 5,566,222 |  |
Bank | Scenario, Previously Reported |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | 41,996 |  |  |
Operating income |  |  | 21,623 |  |  |
Bank | Scenario, Previously Reported | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | 38,370 |  |  |
Operating income |  |  | 21,624 |  |  |
Bank | Accounting Standards Update 2014-01 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | 41,088 |  |  |
Operating income |  |  | 22,531 |  |  |
Bank | Accounting Standards Update 2014-01 | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | 37,462 |  |  |
Operating income |  |  | 22,532 |  |  |
Bank | Accounting Standards Update 2014-01 | Restatement Adjustment |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | (908) |  |  |
Operating income |  |  | 908 |  |  |
Bank | Accounting Standards Update 2014-01 | Restatement Adjustment | American Savings Bank (ASB) |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total expenses |  |  | (908) |  |  |
Operating income |  |  | $ 908 |  |  |
[1] | As restated - See Note 1, “Basis of presentation - Restatement of previously issued financial statements.”

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