Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jul. 22, 2015	Apr. 01, 2015	Jun. 16, 2014	Jan. 01, 2014	Dec. 31, 2013
Fair values of the assets acquired and the liabilities assumed
Goodwill	$ 585,787	$ 106,261					$ 27,966
2015 Journal acquisition
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				$ 2,529
Fair values of the assets acquired and the liabilities assumed
Accounts receivable				47,978
Other assets				2,236
Equipment and software				123,264
Intangible assets				294,800
Total assets acquired				948,097
Long-term deferred tax liability				57,112
Net purchase price				636,000
Goodwill, Acquired During Period	456,440
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				6,350
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Held For Sale				14,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable				38,107
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Employee Benefit Obligation				85,261
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				126,873
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				$ 4,744
2015 Midroll acquisition
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			$ 635
Fair values of the assets acquired and the liabilities assumed
Accounts receivable			2,925
Intangible assets			10,700
Goodwill			46,000
Total assets acquired			60,328
Current liabilities			3,365
Net purchase price			56,963
Goodwill, Acquired During Period	$ 45,586
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			$ 482
2014 Granite stations acquisition
Fair values of the assets acquired and the liabilities assumed
Equipment and software					$ 12,025
Intangible assets					53,500
Goodwill					44,715
Total assets acquired					110,240
Current liabilities					240
Net purchase price					$ 110,000
Goodwill, Acquired During Period		44,715
Media Convergence Group (Newsy) [Member]
Fair values of the assets acquired and the liabilities assumed
Accounts receivable						$ 640
Other assets						74
Equipment and software						631
Intangible assets						5,900
Goodwill						28,983
Total assets acquired						36,228
Current liabilities						116
Long-term deferred tax liability						890
Net purchase price						$ 35,222
Goodwill, Acquired During Period		$ 28,983