Summary of Significant Accounting Policies Summary of Significant Accounting Polices - Effect of Revision (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,292,130	$ 863,938	$ 1,292,130	$ 863,938	$ 1,066,926	$ 857,857
Depreciation and amortization	36,147	30,487	72,100	60,236
Costs and Expenses	61,529	62,129	120,793	116,364
Net income (loss)	1,368	(9,941)	1,437	2,391
Net Income (Loss) Attributable to Parent	1,412	(9,223)	1,582	2,623
Net income (loss) attributable to common stockholders	$ (1,119)	$ (13,319)	$ (3,481)	$ (4,485)
Income (Loss) from Continuing Operations, Per Basic and Diluted Share	$ (0.01)	$ (0.20)	$ (0.04)	$ (0.07)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (142)	$ (15,009)	$ 1,139	$ (14,500)
Scenario, Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		3,540		3,540
Depreciation and amortization		(531)		(1,062)
Costs and Expenses		(531)		(1,062)
Net income (loss)		531		1,062
Net Income (Loss) Attributable to Parent		504		1,007
Net income (loss) attributable to common stockholders		$ 504		$ 1,007
Income (Loss) from Continuing Operations, Per Basic and Diluted Share		$ 0.00		$ 0.01
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 531		$ 1,062
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		860,398		860,398
Depreciation and amortization		31,018		61,298
Costs and Expenses		62,660		117,426
Net income (loss)		(10,472)		1,329
Net Income (Loss) Attributable to Parent		(9,727)		1,616
Net income (loss) attributable to common stockholders		$ (13,823)		$ (5,492)
Income (Loss) from Continuing Operations, Per Basic and Diluted Share		$ (0.20)		$ (0.08)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ (15,540)		$ (15,562)