0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Capacity Purchase Agreement with American link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Lease Obligations link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Sales-type Lease link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Related-Party Transactions link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Earnings Per Share and Equity link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Supplemental Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Stock Repurchase Program link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Lease Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Sales-type Lease (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Earnings Per Share and Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Summary of Significant Accounting Policies - Aviation Disposition (Details) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Summary of Significant Accounting Policies - Description of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Summary of Significant Accounting Policies - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Summary of Significant Accounting Policies - Contract Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Summary of Significant Accounting Policies - Summary of Receivables, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Summary of Significant Accounting Policies - Marketable Securities and Long-Term Restricted Investments and Spare Parts and Supplies (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Summary of Significant Accounting Policies - Summary of Net Unrealized Gains and Losses That Relate to Marketable Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Summary of Significant Accounting Policies - Contract Costs and Contract Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Summary of Significant Accounting Policies - Summary of Current and Non-Current Contract Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Summary of Significant Accounting Policies - Summary of Original Cost of Company's Fixed Assets and Accumulated Depreciation or Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Summary of Significant Accounting Policies - Supplemental Executive Savings Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Summary of Significant Accounting Policies - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Summary of Significant Accounting Policies - Interest and Dividend Income and Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Summary of Significant Accounting Policies - Summary of Classification of Marketable Securities and Long-Term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Summary of Significant Accounting Policies - Reclassifications (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Capacity Purchase Agreement with American (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Lease Obligations - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Lease Obligations - Schedule of Operating Lease Related Terms and Discount Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Lease Obligations - Schedule of Components of Lease Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Lease Obligations - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Lease Obligations - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Sales-type Lease - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Sales-type Lease - Schedule of Undiscounted Cash Flows Over Expected Term of Sales-Type Lease (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Related-Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Earnings Per Share and Equity - Schedule of Calculations of Net (Loss) Income Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Earnings Per Share and Equity - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Supplemental Cash Flow Information - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Supplemental Cash Flow Information - Schedule of Cash and Cash Equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Stock Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink