Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Activity in the allowance for doubtful accounts

The activity in the allowance for doubtful accounts during the years ended December 31, 2015, 2014 and 2013 was as follows:

							Write Off of
	Balance		Charged to		Allowance		Uncollectible		Balance at
	at Beginning		Costs and		From		Accounts, Net of		End of
Year Ended	of Period		Expenses		Acquisitions		Recoveries		Period
	(in thousands)
December 31, 2015	$	395	$	339	$	99	$	(169)	$	664
December 31, 2014	$	578	$	139	$	—	$	(322)	$	395
December 31, 2013	$	577	$	293	$	—	$	(292)	$	578

Property and equipment

Property and equipment consisted of the following:

	Estimated	December 31,
	Useful Life	2015		2014
		(In thousands)
Land and land improvements	—	$	13,207	$	11,026
Buildings	31.5 years		34,543		33,275
Towers and antennae	7-15 years		27,616		26,191
Equipment	3-15 years		79,624		79,216
Furniture, fixtures and leasehold improvements	7-20 years		8,263		8,104
Vehicles	5 years		3,821		3,790
			167,074		161,602
Accumulated depreciation			(108,943)		(106,415)
Net property and equipment		$	58,131	$	55,187

Computation of basic and diluted earnings per share

The following table sets forth the computation of basic and diluted earnings per share:

	Years Ended December 31,
	2015		2014		2013
	(In thousands, except per share data)
Numerator:
Net income	$	13,414	$	14,904	$	15,273
Less: Net income allocated to unvested participating securities		250		234		135
Net income available to common stockholders	$	13,164	$	14,670	$	15,138
Denominator:
Denominator for basic earnings per share-weighted average shares		5,706		5,700		5,681
Effect of dilutive securities:
Stock options		34		53		64
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions		5,740		5,753		5,745
Basic earnings per share	$	2.31	$	2.57	$	2.66
Diluted earnings per share	$	2.29	$	2.55	$	2.64