CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Loss, net	Non-controlling Interest	Total
Balance at Dec. 31, 2016	$ 506	$ 217,725		$ (47,277)	$ 5,301	$ 176,255
Balance (in shares) at Dec. 31, 2016	50,612
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock		(34,764)	$ (67,187)			(101,951)
Shares issued upon acquisition of FairPoint	$ 201	430,752				430,953
Shares issued upon the acquisition of FairPoint (in shares)	20,104
Shares issued under employee plan, net of forfeitures	$ 1	104				105
Shares issued under employee plan, net of forfeitures (in shares)	121
Non-cash, share-based compensation		2,766				2,766
Purchase and retirement of common stock		(571)				(571)
Purchase and retirement of common stock (in shares)	(60)
Other comprehensive income (loss)				(806)		(806)
Other		(350)				(350)
Cumulative adjustment of new accounting standard adoption			2,242			2,242
Net income (loss)			64,945		354	65,299
Balance at Dec. 31, 2017	$ 708	615,662		(48,083)	5,655	573,942
Balance (in shares) at Dec. 31, 2017	70,777
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock		(107,112)	(3,271)			(110,383)
Shares issued under employee plan, net of forfeitures	$ 5	(7)				(2)
Shares issued under employee plan, net of forfeitures (in shares)	460
Non-cash, share-based compensation		5,119				5,119
Purchase and retirement of common stock	$ (1)	(592)				(593)
Purchase and retirement of common stock (in shares)	(50)
Other comprehensive income (loss)				(5,129)		(5,129)
Cumulative adjustment of new accounting standard adoption | ASU 2014-09			3,271			3,271
Net income (loss)			(50,834)		263	(50,571)
Balance at Dec. 31, 2018	$ 712	513,070	(50,834)	(53,212)	5,918	415,654
Balance (in shares) at Dec. 31, 2018	71,187
Increase (Decrease) in Stockholders' Equity
Cash dividends on common stock		(27,289)	(576)			(27,865)
Shares issued under employee plan, net of forfeitures	$ 9	(9)
Shares issued under employee plan, net of forfeitures (in shares)	870
Non-cash, share-based compensation		6,836				6,836
Purchase and retirement of common stock	$ (1)	(362)				(363)
Purchase and retirement of common stock (in shares)	(96)
Other comprehensive income (loss)				(27,656)		(27,656)
Cumulative adjustment of new accounting standard adoption | ASU 2017-12			576			576
Net income (loss)			(20,383)		452	(19,931)
Balance at Dec. 31, 2019	$ 720	$ 492,246	$ (71,217)	$ (80,868)	$ 6,370	$ 347,251
Balance (in shares) at Dec. 31, 2019	71,961