Represents amounts by which contractual amounts of accounts receivable exceed their recorded fair value.

No definition available.

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Namespace Prefix:	gtn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The pro forma operating income (loss) from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

No definition available.

+ Details

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Namespace Prefix:	gtn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of consideration transferred (Received), consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

No definition available.

+ Details

Name:	gtn_BusinessCombinationConsiderationTransferredReceived
Namespace Prefix:	gtn_
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Balance Type:	credit
Period Type:	duration

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
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-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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Note 2 - Acquisitions and Dispositions (Details Textual) - USD ($)			3 Months Ended
	Feb. 16, 2016	Feb. 01, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
KAKE-TV [Member]
Proceeds from Divestiture of Businesses		$ 11,200,000	$ 11,200,000
Gain (Loss) on Disposition of Business		$ 2,000,000
Business Combination, Consideration Transferred
Business Combination, Consideration Transferred (Received)			$ (41,200,000)
Schurz Acquisition [Member]
Proceeds from Divestiture of Businesses	$ 16,000,000
Business Combination, Consideration Transferred	443,400,000		$ 443,448,000
Business Combination, Consideration Transferred (Received)			$ 427,448,000
Schurz Acquisition and Related Transaction [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life			3 years
Schurz Acquisition and Related Transaction [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life			40 years
Schurz Acquisition and Related Transaction [Member] \| Retransmission Agreements [Member]
Finite-lived Intangible Assets Acquired			$ 15,100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 years 328 days
Schurz Acquisition and Related Transaction [Member] \| Advertising Relationships [Member]
Finite-lived Intangible Assets Acquired			$ 1,600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			5 years 182 days
Schurz Acquisition and Related Transaction [Member] \| Off-Market Favorable Lease [Member]
Finite-lived Intangible Assets Acquired			$ 2,600,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			9 years 219 days
Schurz Acquisition and Related Transaction [Member] \| WBXX Acquisition [Member]
Business Combination, Acquisition Related Costs			$ 6,700,000
Schurz Acquisition and Related Transaction [Member]
Business Combination, Consideration Transferred (Received)	416,200,000
Goodwill, Acquired During Period			71,600,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			16,600,000
Business Acquisition, Operating Incom (Loss) from Continuing Operations Before Changes in Accounting and Extraordinary Items, Net of Tax			$ 5,800,000
WBXX Acquisition [Member]
Proceeds from Divestiture of Businesses
Business Combination, Consideration Transferred			$ 30,000,000
Business Combination, Consideration Transferred (Received)			30,000,000
Accounts Receivable Contractual Amounts in Excess of Fair Value			200,000
2016 Term Loan [Member]
Long-term Debt	$ 425,000,000
Proceeds from Divestiture of Businesses			11,200,000	$ 0
Business Combination, Consideration Transferred			473,448,000
Business Combination, Consideration Transferred (Received)			416,248,000
Long-term Debt			1,600,000,000		$ 1,200,000,000
Finite-lived Intangible Assets Acquired			19,739,000
Goodwill, Acquired During Period			$ 71,640,000