Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

A rollforward of the allowance for doubtful accounts is as follows:



(in thousands)

January 1, 2014	$	1,120
Charged to costs and expenses	1,073
Amounts charged off, net	(803		)
Balance as of December 31, 2014	1,390
Charged to costs and expenses	1,412
Amounts charged off, net	(1,192		)
Balance as of December 31, 2015	1,610
Charged to costs and expenses	1,851
Amounts charged off, net	(1,829		)
Balance as of December 31, 2016	$	1,632

We compute depreciation using the straight-line method over estimated useful lives as follows:



Buildings and improvements	15 to 45 years
Leasehold improvements	Shorter of term of lease or useful life
Broadcast transmission towers and related equipment	15 to 35 years
Other broadcast and program production equipment	3 to 15 years
Computer hardware	3 to 5 years
Office and other equipment	3 to 10 years

Property and equipment consisted of the following:

The following table presents information about basic and diluted weighted-average shares outstanding:



	For the years ended December 31,
(in thousands)	2016			2015			2014

Numerator (for basic and diluted earnings per share)
Net income (loss)	$	67,235		$	(82,477	)	$	10,529
Less income allocated to RSUs	(917		)	—			(240		)
Numerator for basic and diluted earnings per share	$	66,318		$	(82,477	)	$	10,289
Denominator
Basic weighted-average shares outstanding	83,339			77,373			56,342
Effect of dilutive securities:
Stock options held by employees and directors	300			—			897
Diluted weighted-average shares outstanding	83,639			77,373			57,239
Anti-dilutive securities⁽¹⁾	—			1,907			—


⁽¹⁾	Amount outstanding at Balance Sheet date, before application of the treasury stock method and not weighted for period outstanding.