UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Operating revenues	$ 156,836	$ 85,212	$ 379,716	$ 255,202
Operating expenses:
Cost of goods and services, exclusive of depreciation and amortization shown separately below	58,317	30,570	140,354	91,541
Selling, general and administrative, exclusive of depreciation and amortization shown separately below	40,369	18,306	96,263	55,024
Integration and acquisition expenses	15,272	2,129	35,801	3,153
Depreciation and amortization	46,807	19,118	96,961	53,119
Total operating expenses	160,765	70,123	369,379	202,837
Operating income (loss)	(3,929)	15,089	10,337	52,365
Other income (expense):
Interest expense	(8,845)	(1,808)	(16,369)	(5,663)
Gain (loss) on investments, net	127	(211)	237	(12)
Non-operating income, net	1,400	391	2,910	1,265
Income (loss) before income taxes	(11,247)	13,461	(2,885)	47,955
Income tax expense (benefit)	(3,651)	5,465	(2,174)	19,199
Net income (loss)	(7,596)	7,996	(711)	28,756
Other comprehensive income (loss):
Unrealized gain (loss) on interest rate hedge, net of tax	1,712	(979)	(2,573)	(1,560)
Comprehensive income (loss)	$ (5,884)	$ 7,017	$ (3,284)	$ 27,196
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.16)	$ 0.17	$ (0.01)	$ 0.59
Diluted (in dollars per share)	$ (0.16)	$ 0.16	$ (0.01)	$ 0.59
Weighted average shares outstanding, basic (in shares)	48,909	48,406	48,768	48,364
Weighted average shares outstanding, diluted (in shares)	48,909	49,071	48,768	48,967