Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Activity in the allowance for doubtful accounts

The activity in the allowance for doubtful accounts during the years ended December 31, 2016, 2015 and 2014 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, 2016	$	664	$	206	$	—	$	(310)	$	560
December 31, 2015	$	395	$	339	$	99	$	(169)	$	664
December 31, 2014	$	578	$	139	$	—	$	(322)	$	395

Property and equipment

Property and equipment consisted of the following:

	Estimated		December 31,
	Useful Life		2016		2015
			(In thousands)
Land and land improvements		—	$	13,206	$	13,207
Buildings		31.5 years		34,790		34,543
Towers and antennae		7-15 years		27,081		27,616
Equipment		3-15 years		73,287		79,624
Furniture, fixtures and leasehold improvements		7-20 years		7,776		8,263
Vehicles		5 years		3,828		3,821
				159,968		167,074
Accumulated depreciation				(103,406)		(108,943)
Net property and equipment			$	56,562	$	58,131

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,
	2016		2015		2014
	(In thousands, except per share data)
Numerator:
Net income	$	18,186	$	13,414	$	14,904
Less: Net income allocated to unvested participating securities		325		250		234
Net income available to common stockholders	$	17,861	$	13,164	$	14,670
Denominator:
Denominator for basic earnings per share-weighted average shares		5,761		5,706		5,700
Effect of dilutive securities:
Stock options		10		34		53
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions		5,771		5,740		5,753
Basic earnings per share	$	3.10	$	2.31	$	2.57
Diluted earnings per share	$	3.09	$	2.29	$	2.55