Summary of Significant Accounting Policies (Details Textual)			1 Months Ended						3 Months Ended					12 Months Ended
	Jun. 10, 2015 USD ($) $ / shares	Dec. 03, 2014 USD ($) $ / shares	Nov. 17, 2015 USD ($) $ / shares	Sep. 02, 2015 USD ($) $ / shares	Mar. 25, 2015 USD ($) $ / shares	Sep. 23, 2014 USD ($) $ / shares	Jun. 30, 2014 USD ($) $ / shares	Nov. 21, 2013 USD ($) $ / shares	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares
Summary Of Significant Accounting Policies [Line Items]
Four-for-three stock split														The stock split increased the Companys issued and outstanding shares of common stock from 3,659,753 shares of Class A Common Stock and 597,504 shares of Class B Common Stock to 4,879,186 and 796,672 shares, respectively.
Number of stock options outstanding having antidilutive effect | shares														0	45,000	13,000
Concentration Risk, Market Risk														44.00%	43.00%	44.00%
Depreciation expense														$ 6,593,000	$ 6,648,000	$ 6,716,000
Interest expense related to the amortization of debt issuance costs														131,000	187,000	204,000
Write-off debt issuance costs									$ 557,000	$ 0	$ 0	$ 0	$ 0	557,000	0	$ 55,000
Net book value of deferred costs														$ 244,000	$ 636,000
Treasury Stock, Shares, Acquired | shares														129,384	6,165	2,179
Treasury Stock Acquired, Average Cost Per Share | $ / shares														$ 36.53	$ 41.15	$ 43.98
Advertising and promotion costs														$ 2,804,000	$ 3,056,000	$ 3,225,000
Special cash dividend declared on Classes A and B Common Stock | $ / shares	$ 0.20	$ 1.20	$ 0.25	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 1.80						$ 1.1	$ 1.8	$ 1.8
Dividend paid	$ 1,200,000	$ 8,200,000	$ 2,900,000	$ 1,200,000	$ 1,200,000	$ 1,100,000	$ 1,100,000	$ 10,300,000
Number Of Broadcast Licenses														107
Number Of Market Serving														26
Dividends Payable, Amount Per Share | $ / shares		$ 0.20	$ 0.25
Class A Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount														$ 24,900,000
Minimum [Member] | Class A Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock Repurchase Program, Authorized Amount														60,000,000
Maximum [Member] | Class A Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock Repurchase Program, Authorized Amount														$ 75,800,000
Favorable Lease Agreements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortized over the lives of the leases term range														4 years
Favorable Lease Agreements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortized over the lives of the leases term range														26 years