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v3.3.1.900

Federal, State and Local Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Line Items] |  |  |  |  |
Outstanding amount of the investment |  | $ 35,400,000 | $ 37,800,000 |  |
Other commitments of additional anticipated equity contributions relating to current investments |  | $ 18,300,000 | 21,700,000 |  |
Commitments period |  | 3 years |  |  |
Effect of adopting Accounting Standards Update 2014-01 |  |  | (1,303,000) |  |
Affordable housing tax credits and other tax benefits recognized |  | $ 3,200,000 | 3,900,000 |  |
Affordable housing tax credits and other tax benefits, related amortization recognized |  | 2,400,000 | 2,900,000 |  |
Affordable housing tax credits and other tax benefits, impairment losses |  | 0 | 0 |  |
Total assets |  | $ 50,317,796,000 | 48,559,217,000 |  |
Percentage of alternative tax on apportioned capital |  | 0.15% |  |  |
Alternative tax capped value, New York State |  | $ 5,000,000 |  |  |
Alternative tax - phased out period |  | 6 years |  |  |
Unrecognized gross tax benefits |  | $ 30,456,000 | 24,779,000 | $ 20,250,000 | $ 24,220,000
Total amount of net unrecognized tax benefits that would affect the effective tax rate, if recognized |  | 19,800,000 |  |  |
Income tax benefit attributed to interest and penalties |  | 1,100,000 | 700,000 | $ 900,000 |
Accrued interest and penalties on tax liabilities |  | 5,000,000 | 3,400,000 |  |
Net deferred tax liabilities |  |  | $ 20,266,000 |  |
Maximum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Estimated change in balance of unrecognized tax benefit, within next twelve months |  | (14,000,000) |  |  |
New York State Division of Taxation and Finance |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating loss carryforward |  | $ 169,200,000 |  |  |
Operating loss carryforward , expiration year |  | 2035 |  |  |
Effective tax rate |  | 7.10% |  |  |
New York State Division of Taxation and Finance | Scenario, Forecast |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Effective tax rate | 6.50% |  |  |  |
New York City |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating loss carryforward |  | $ 478,800,000 |  |  |
Operating loss carryforward , expiration year |  | 2035 |  |  |
Alternative tax capped value, New York State |  | $ 10,000,000 |  |  |
New York City | Financial institutions with total assets below $100 billion |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Effective tax rate |  | 9.00% |  |  |
New York City | Tax benefit on Interest income earned or situated in low-income communities phased out for financial institutions with total assets | Minimum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Total assets |  | $ 100,000,000,000 |  |  |
New York City | Tax benefit on Interest income earned or situated in low-income communities phased out for financial institutions with total assets | Maximum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Total assets |  | 150,000,000,000 |  |  |
New York City | Scenario, Forecast | Financial institutions with total assets below $100 billion |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Effective tax rate | 8.85% |  |  |  |
Special Federal Tax Provision |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Tax bad debt base-year reserves |  | 61,500,000 |  |  |
Net deferred tax liabilities |  | $ 21,500,000 |  |  |

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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49127445&loc=SL49122993-202985 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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