Restatement of Previously Issued Financial Statements (Impact on Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Cash flows from operating activities:
Net Income	[1]	$ (2,739)		$ 10,571	$ (1,839)	[2]	$ 20,391	[2]
Depreciation and amortization	[2]				19,761		15,339
(Gain) loss on disposal of property and equipment	[2]				(236)		1,700
Provision for bad debts	[2]				1,450		2,065
Deferred tax provision	[2]				367		1,366
Share-based compensation		577		825	1,126		1,621
Adjustments to contingent purchase obligation					0		(191)
Tax deficiency on share-based compensation	[2]				285		(1,191)
Changes in:
Accounts receivable	[2]				(4,095)		(26,981)
Income tax receivable	[2]				(4,230)		(6,235)
Prepaid expenses and other assets	[2]				12,922		5,550
Accounts payable	[2]				17,257		(3,637)
Accrued expenses and other liabilities	[2]				(7,025)		8,672
Net cash provided by operating activities	[2]				35,743		18,469
Cash flows from investing activities:
Acquisition of business, net of cash acquired	[2]				0		(87)
Capital expenditures	[2]				(10,631)		(25,935)
Proceeds from sale of property and equipment	[2]				5,082		1,996
Net cash used in investing activities	[2]				(5,549)		(24,026)
Cash flows from financing activities:
Net cash (used in) provided by financing activities	[2]				(32,025)		697
Net decrease in cash and cash equivalents	[2]				(1,831)		(4,860)
Cash and cash equivalents:
Beginning of period					7,930	[3]	10,809	[2]
End of period	[2]	6,099	[3]	5,949	6,099	[3]	5,949
As Previously Reported
Cash flows from operating activities:
Net Income		1,798		16,471	4,863		30,075
Depreciation and amortization					20,439		15,511
(Gain) loss on disposal of property and equipment					(1,556)		50
Provision for bad debts					974		1,044
Deferred tax provision					367		1,366
Share-based compensation					1,126		1,621
Adjustments to contingent purchase obligation							0
Tax deficiency on share-based compensation					285		(1,191)
Changes in:
Accounts receivable					(2,352)		(27,968)
Income tax receivable					0		0
Prepaid expenses and other assets					8,316		2,392
Accounts payable					14,493		(5,502)
Accrued expenses and other liabilities					(7,189)		2,565
Net cash provided by operating activities					39,766		19,963
Cash flows from investing activities:
Acquisition of business, net of cash acquired							(87)
Capital expenditures					(13,766)		(27,714)
Proceeds from sale of property and equipment					5,082		1,996
Net cash used in investing activities					(8,684)		(25,805)
Cash flows from financing activities:
Net cash (used in) provided by financing activities					(31,954)		960
Net decrease in cash and cash equivalents					(872)		(4,882)
Cash and cash equivalents:
Beginning of period					8,664		11,345
End of period		7,792		6,463	7,792		6,463
Adjustments
Cash flows from operating activities:
Net Income					(6,702)		(9,684)
Depreciation and amortization					(678)		(172)
(Gain) loss on disposal of property and equipment					1,320		1,650
Provision for bad debts					476		1,021
Deferred tax provision					0		0
Share-based compensation					0		0
Adjustments to contingent purchase obligation							(191)
Tax deficiency on share-based compensation					0		0
Changes in:
Accounts receivable					(1,743)		987
Income tax receivable					(4,230)		(6,235)
Prepaid expenses and other assets					4,606		3,158
Accounts payable					2,764		1,865
Accrued expenses and other liabilities					164		6,107
Net cash provided by operating activities					(4,023)		(1,494)
Cash flows from investing activities:
Acquisition of business, net of cash acquired							0
Capital expenditures					3,135		1,779
Proceeds from sale of property and equipment					0		0
Net cash used in investing activities					3,135		1,779
Cash flows from financing activities:
Net cash (used in) provided by financing activities					(71)		(263)
Net decrease in cash and cash equivalents					(959)		22
Cash and cash equivalents:
Beginning of period					(734)		(536)
End of period		$ (1,693)		$ (514)	$ (1,693)		$ (514)

[1] See Note 13 “Restatement of Previously Issued Financial Statements

[2] See Note 13 “Restatement of Previously Issued Financial Statements.”

[3] See Note 13 “Restatement of Previously Issued Financial Statements