Depreciation and Amortization (Tables)

6 Months Ended

Jun. 30, 2016

Depreciation And Amortization [Abstract]

Depreciation and Amortization Expense Excluded from Operating Expenses in its Statements of Income and Comprehensive Income

The amounts of depreciation and amortization expense excluded from the following operating expenses in its Statements of Income and Comprehensive Income are: 

	Three months ended June 30,				Six months ended June 30,
	2016		2015		2016		2015
Direct advertising expenses	$	48,267	$	44,805	$	96,065	$	89,890
General and administrative expenses		902		834		1,783		1,557
Corporate expenses		2,764		3,086		5,574		6,508
	$	51,933	$	48,725	$	103,422	$	97,955