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Actual Capital Amounts and Ratios for Community Bank in Comparison to Minimum Amounts and Ratios Required (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Common Equity, Tier 1 Amount |  |
Total regulatory capital, Common Equity, Tier 1 Amount | $ 3,558,415 |
Minimum for capital adequacy purposes, Common Equity, Tier 1 Amount | 1,526,064 |
Excess, Common Equity, Tier 1 Amount | $ 2,032,351 |
Common Equity, Tier 1 Ratio |  |
Total regulatory capital, Common Equity, Tier 1 Ratio | 10.49% |
Minimum for capital adequacy purposes, Common Equity, Tier 1 Ratio | 4.50% |
Excess, Common Equity, Tier 1 Ratio | 5.99% |
Leverage Capital, Amount |  |
Total regulatory capital, Leverage Capital, Amount | $ 3,644,872 | $ 3,731,430
Minimum for capital adequacy purposes, Leverage Capital, Amount | 1,876,006 | 1,856,755
Excess, Leverage Capital, Amount | $ 1,768,866 | $ 1,874,675
Leverage Capital, Ratio |  |
Total regulatory capital, Leverage Capital, Ratio | 7.77% | 8.04%
Minimum for capital adequacy purposes, Leverage Capital, Ratio | 4.00% | 4.00%
Excess, Leverage Capital, Ratio | 3.77% | 4.04%
Risk-Based Capital, Tier 1 Amount |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Amount | $ 3,644,872 | $ 3,731,430
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Amount | 2,034,752 | 1,213,802
Excess, Risk-Based Capital, Tier 1 Amount | $ 1,610,120 | $ 2,517,628
Risk-Based Capital, Tier 1 Ratio |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Ratio | 10.75% | 12.30%
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Ratio | 6.00% | 4.00%
Excess, Risk-Based Capital, Tier 1 Ratio | 4.75% | 8.30%
Risk-Based Capital, Total Amount |  |
Total regulatory capital, Risk-Based Capital, Total Amount | $ 4,086,913 | $ 3,919,248
Minimum for capital adequacy purposes, Risk-Based Capital, Total Amount | 2,713,003 | 2,427,605
Excess, Risk-Based Capital, Total Amount | $ 1,373,910 | $ 1,491,643
Risk-Based Capital, Total Ratio |  |
Total regulatory capital, Risk-Based Capital, Total Ratio | 12.05% | 12.92%
Minimum for capital adequacy purposes, Risk-Based Capital, Total Ratio | 8.00% | 8.00%
Excess, Risk-Based Capital, Total Ratio | 4.05% | 4.92%
New York Community Bank |  |
Common Equity, Tier 1 Amount |  |
Total regulatory capital, Common Equity, Tier 1 Amount | $ 3,478,429 |
Minimum for capital adequacy purposes, Common Equity, Tier 1 Amount | 1,417,588 |
Excess, Common Equity, Tier 1 Amount | $ 2,060,841 |
Common Equity, Tier 1 Ratio |  |
Total regulatory capital, Common Equity, Tier 1 Ratio | 11.04% |
Minimum for capital adequacy purposes, Common Equity, Tier 1 Ratio | 4.50% |
Excess, Common Equity, Tier 1 Ratio | 6.54% |
Leverage Capital, Amount |  |
Total regulatory capital, Leverage Capital, Amount | $ 3,478,429 | $ 3,285,870
Minimum for capital adequacy purposes, Leverage Capital, Amount | 1,729,021 | 1,701,174
Excess, Leverage Capital, Amount | $ 1,749,408 | $ 1,584,696
Leverage Capital, Ratio |  |
Total regulatory capital, Leverage Capital, Ratio | 8.05% | 7.73%
Minimum for capital adequacy purposes, Leverage Capital, Ratio | 4.00% | 4.00%
Excess, Leverage Capital, Ratio | 4.05% | 3.73%
Risk-Based Capital, Tier 1 Amount |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Amount | $ 3,478,429 | $ 3,285,870
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Amount | 1,890,117 | 1,093,835
Excess, Risk-Based Capital, Tier 1 Amount | $ 1,588,312 | $ 2,192,035
Risk-Based Capital, Tier 1 Ratio |  |
Total regulatory capital, Risk-Based Capital, Tier 1 Ratio | 11.04% | 12.02%
Minimum for capital adequacy purposes, Risk-Based Capital, Tier 1 Ratio | 6.00% | 4.00%
Excess, Risk-Based Capital, Tier 1 Ratio | 5.04% | 8.02%
Risk-Based Capital, Total Amount |  |
Total regulatory capital, Risk-Based Capital, Total Amount | $ 3,645,262 | $ 3,461,741
Minimum for capital adequacy purposes, Risk-Based Capital, Total Amount | 2,520,156 | 2,187,669
Excess, Risk-Based Capital, Total Amount | $ 1,125,106 | $ 1,274,072
Risk-Based Capital, Total Ratio |  |
Total regulatory capital, Risk-Based Capital, Total Ratio | 11.57% | 12.66%
Minimum for capital adequacy purposes, Risk-Based Capital, Total Ratio | 8.00% | 8.00%
Excess, Risk-Based Capital, Total Ratio | 3.57% | 4.66%

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