1001 - Document - Document and Entity Information
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1002 - Statement - Condensed Consolidated Balance Sheets
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1003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)
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1004 - Statement - Condensed Consolidated Statements of Income
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1005 - Statement - Condensed Consolidated Statements of Comprehensive Income
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1006 - Statement - Condensed Consolidated Statements of Comprehensive Income (Parenthetical)
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1007 - Statement - Consolidated Statements of Stockholders' Equity
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1008 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)
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1009 - Statement - Condensed Consolidated Statements of Cash Flows
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1010 - Disclosure - Summary of Significant Accounting Policies
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1011 - Disclosure - Securities
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1012 - Disclosure - Loans and Allowance for Loan Losses
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1013 - Disclosure - Benefit Plans
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1014 - Disclosure - Off-balance-sheet Activities
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1015 - Disclosure - Accumulated Other Comprehensive Loss
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1016 - Disclosure - Fair Value Measurements
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1017 - Disclosure - Repurchase Agreements
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1018 - Disclosure - Acquisition
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1019 - Disclosure - Subsequent Event
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1020 - Disclosure - Summary of Significant Accounting Policies (Policies)
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1021 - Disclosure - Summary of Significant Accounting Policies (Tables)
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1022 - Disclosure - Securities (Tables)
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1023 - Disclosure - Loans and Allowance for Loan Losses (Tables)
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1024 - Disclosure - Benefit Plans (Tables)
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1025 - Disclosure - Off-balance-sheet Activities (Tables)
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1026 - Disclosure - Accumulated Other Comprehensive Loss (Tables)
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1027 - Disclosure - Fair Value Measurements (Tables)
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1028 - Disclosure - Repurchase Agreements (Tables)
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1029 - Disclosure - Acquisition (Tables)
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1030 - Disclosure - Summary of Significant Accounting Policies (Detail)
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1031 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)
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1032 - Disclosure - Amortized Cost and Approximate Fair Values, Together with Gross Unrealized Gains and Losses of Securities (Detail)
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1033 - Disclosure - Amortized Cost and Fair Value of Available-for-Sale Securities and Held-to-Maturity Securities (Detail)
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1034 - Disclosure - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category and Length of Time that Individual Securities have been in a Continuous Unrealized Loss Position (Detail)
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1035 - Disclosure - Securities - Additional Information (Detail)
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1036 - Disclosure - Categories of Loan (Detail)
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1037 - Disclosure - Allowance for Loan Losses and Recorded Investment in Loans (Detail)
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1038 - Disclosure - Portfolio Quality Indicators (Detail)
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1039 - Disclosure - Loan Portfolio Aging Analysis (Detail)
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1040 - Disclosure - Impaired Loans (Detail)
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1041 - Disclosure - Troubled Debt Restructuring (Detail)
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1042 - Disclosure - Pension Expense (Detail)
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1043 - Disclosure - Off-balance-sheet Activities (Detail)
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1044 - Disclosure - Components of Accumulated Other Comprehensive Income Included in Stockholders' Equity (Detail)
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1045 - Disclosure - Fair Value Measurements of Assets Recognized in Consolidated Balance Sheets Measured at Fair Value on Recurring Basis (Detail)
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1046 - Disclosure - Fair Value Measurements of Assets Recognized in Consolidated Balance Sheets Measured at Fair Value on Nonrecurring Basis (Detail)
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1047 - Disclosure - Quantitative Information About Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements (Detail)
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1048 - Disclosure - Estimated Fair Values of Company's Financial Instruments (Detail)
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1049 - Disclosure - Repurchase Agreements (Details)
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1050 - Disclosure - Repurchase Agreements-Additional Information (Detail)
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1051 - Disclosure - Acquisition (Details)
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1052 - Disclosure - Acquisition - Additional Information (Detail)
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1053 - Disclosure - Subsequent Event (Detail)
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