v3.5.0.2

Condensed Consolidating Financial Information - Guarantor Subsidiaries - Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash (used in) provided by operating activities |  | $ (7,148) | $ 108,155
Investing activities: |  |  |
Purchase of property and equipment |  | (74,950) | (48,244)
Proceeds from asset dispositions |  | 13,233 | 3,469
Purchase of short-term investments |  | (263,204) | (560,148)
Proceeds from sale of short-term investments |  | 259,322 | 458,468
Refund of deposits on aircraft |  |  | 6,010
Payments of deposits on aircraft |  | (197) | (1,207)
Loan to unconsolidated affiliate |  | (1,200) |
Net cash used in investing activities |  | (66,996) | (141,652)
Financing activities: |  |  |
Proceeds from line of credit |  | 213,900 | 206,660
Payments on line of credit |  | (139,000) | (171,440)
Repurchase of common stock for payroll tax withholding requirements |  | (524) | (2,441)
Net cash provided by (used in) financing activities |  | 74,376 | 32,779
Increase (decrease) in cash |  | 232 | (718)
Cash, beginning of period |  | 2,407 | 6,270
Cash, end of period |  | 2,639 | 5,552
Parent Company Only (issuer) [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash (used in) provided by operating activities |  | (32,467) | 39,490
Investing activities: |  |  |
Purchase of property and equipment |  | (74,647) | (48,244)
Proceeds from asset dispositions |  | 13,233 | 3,469
Purchase of short-term investments |  | (263,204) | (560,148)
Proceeds from sale of short-term investments |  | 259,322 | 458,468
Refund of deposits on aircraft |  |  | 6,010
Payments of deposits on aircraft |  | (197) | (1,207)
Loan to unconsolidated affiliate |  | (1,200) |
Net cash used in investing activities |  | (66,693) | (141,652)
Financing activities: |  |  |
Proceeds from line of credit |  | 213,900 | 206,660
Payments on line of credit |  | (139,000) | (171,440)
Repurchase of common stock for payroll tax withholding requirements |  | (524) | (2,441)
Due to/from affiliate, net |  | 24,774 | 70,792
Net cash provided by (used in) financing activities |  | 99,150 | 103,571
Increase (decrease) in cash |  | (10) | 1,409
Cash, beginning of period |  | 46 | 51
Cash, end of period |  | 36 | 1,460
Guarantor Subsidiaries [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash (used in) provided by operating activities | [1] | 25,319 | 68,665
Investing activities: |  |  |
Purchase of property and equipment | [1] | (303) |
Net cash used in investing activities | [1] | (303) |
Financing activities: |  |  |
Due to/from affiliate, net | [1] | (24,774) | (70,792)
Net cash provided by (used in) financing activities | [1] | (24,774) | (70,792)
Increase (decrease) in cash | [1] | 242 | (2,127)
Cash, beginning of period | [1] | 2,361 | 6,219
Cash, end of period | [1] | $ 2,603 | $ 4,092
[1] | Foreign subsidiaries represent minor subsidiaries and are included in the guarantor subsidiaries' amounts.

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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