CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (loss)	$ (24,154)	$ 58,956	$ 51,157
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	259,642	245,005	251,958
Stock based compensation expense	5,318us-gaap_ShareBasedCompensation	4,363us-gaap_ShareBasedCompensation	4,693us-gaap_ShareBasedCompensation
Loss on sale of property and equipment	4,016		621
(Gain) loss from equity ownership in TRIP and AirMekong airlines	(24,922)	(10,830)	10,199
Capitalized Brasilia EMB-120 engine overhauls	(18,812)skyw_BrasiliaEngineOverhauls	(29,606)skyw_BrasiliaEngineOverhauls	(25,742)skyw_BrasiliaEngineOverhauls
Special items	74,777
Net increase in deferred income taxes	5,054us-gaap_DeferredIncomeTaxExpenseBenefit	38,007us-gaap_DeferredIncomeTaxExpenseBenefit	34,800us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in operating assets and liabilities:
Decrease (increase) in restricted cash	637	7,334	(119)
Decrease (increase) in receivables	25,540	18,916	408
Decrease (increase) in income tax receivable	(1,939)	(840)	1,568
Decrease (increase) in inventories	(890)us-gaap_IncreaseDecreaseInInventories	(24,513)us-gaap_IncreaseDecreaseInInventories	1,630us-gaap_IncreaseDecreaseInInventories
Increase in other current assets and prepaid aircraft rents	(25,985)	(31,578)	(39,451)
Decrease in deferred aircraft credits	(7,672)	(8,432)	(7,112)
Increase (decrease) in accounts payable and accrued aircraft rents	5,852	17,594	(7,653)
Increase in other current liabilities	9,077	5,514	11,867
NET CASH PROVIDED BY OPERATING ACTIVITIES	285,539	289,890	288,824
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(326,964)	(488,564)	(736,330)
Sales of marketable securities	398,148	557,424	677,798
Proceeds from the sale of aircraft, property and equipment	9,473	293	15,265
Proceeds from installment payment of equity shares of TRIP	17,237	16,658	8,064
Acquisition of property and equipment:
Aircraft and rotable spare parts	(653,473)us-gaap_PaymentsForFlightEquipment	(102,499)us-gaap_PaymentsForFlightEquipment	(57,277)us-gaap_PaymentsForFlightEquipment
Deposits on aircraft		(40,000)skyw_PaymentsForDepositsOnAircraft
Buildings and ground equipment	(21,966)	(9,502)	(7,662)
Decrease (Increase) in other assets	(7,681)	229	(8,218)
NET CASH USED IN INVESTING ACTIVITIES	(585,226)	(65,961)	(108,360)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	460,600		44,900
Principal payments on long-term debt	(185,357)us-gaap_RepaymentsOfLongTermDebt	(171,453)us-gaap_RepaymentsOfLongTermDebt	(218,270)us-gaap_RepaymentsOfLongTermDebt
Net proceeds from issuance of common stock	2,692	4,385	6,231
Purchase of treasury stock	(8,414)	(11,739)	(902)
Payment of cash dividends	(8,195)us-gaap_PaymentsOfDividends	(8,258)us-gaap_PaymentsOfDividends	(8,177)us-gaap_PaymentsOfDividends
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	261,326	(187,065)	(176,218)
Increase (decrease) in cash and cash equivalents	(38,361)	36,864	4,246
Cash and cash equivalents at beginning of year	170,636	133,772	129,526
CASH AND CASH EQUIVALENTS AT END OF YEAR	132,275	170,636	133,772
Cash paid (received) during the year for:
Interest, net of capitalized amounts	67,763us-gaap_InterestPaidNet	71,323us-gaap_InterestPaidNet	78,407us-gaap_InterestPaidNet
Income taxes	$ 2,066us-gaap_IncomeTaxesPaidNet	$ 3,678us-gaap_IncomeTaxesPaidNet	$ (1,354)us-gaap_IncomeTaxesPaidNet

The cash out flow for the capitalized engine overhauls for the EMB 120 aircraft.

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Change during the period in carrying value for all deferred aircraft credits.

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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. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.

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The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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Period Type:	duration

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

+ Details

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

+ Details

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Balance Type:	credit
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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

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