Restatement of Previously Issued Consolidated Financial Statements - Effect of The Error Corrections On The Condensed Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 126,896	$ 243,190	$ 314,001	$ 486,354
Cost of Revenues	120,421	210,754	287,223	420,829
Gross Profit	6,475	32,436	26,778	65,525
Selling, General and Administrative Expenses	15,984	16,248	33,083	31,447
Amortization Expense	856	322	1,716	643
Operating (Loss) Income	(10,515)	15,866	(37,038)	33,435
Interest and Other Expense	5,104	7,490	10,469	11,886
(Loss) Income Before Provision for Income Taxes	(15,619)	8,376	(47,507)	21,549
Provision for income taxes	(3,122)	2,230	(10,416)	5,417
Net (Loss) Income	$ (12,497)	$ 6,146	$ (37,091)	$ 16,132
Income per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.40)	$ 0.20	$ (1.20)	$ 0.53
Diluted (in dollars per share)	$ (0.40)	$ 0.20	$ (1.20)	$ 0.52
Weighted average common shares outstanding:
Basic (in shares)	30,890	30,547	30,848	30,530
Diluted (in shares)	30,890	30,824	30,848	30,731
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues		$ 243,190		$ 486,354
Cost of Revenues		209,407		418,011
Gross Profit		33,783		68,343
Selling, General and Administrative Expenses		16,248		31,447
Amortization Expense		322		643
Operating (Loss) Income		17,213		36,253
Interest and Other Expense		7,490		11,886
(Loss) Income Before Provision for Income Taxes		9,723		24,367
Provision for income taxes		2,546		6,060
Net (Loss) Income		$ 7,177		$ 18,307
Income per share attributable to common stockholders:
Basic (in dollars per share)		$ 0.23		$ 0.60
Diluted (in dollars per share)		$ 0.23		$ 0.60
Weighted average common shares outstanding:
Basic (in shares)		30,547		30,530
Diluted (in shares)		30,824		30,731
Restatement Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues		$ 0		$ 0
Cost of Revenues		1,347		2,818
Gross Profit		(1,347)		(2,818)
Selling, General and Administrative Expenses		0		0
Amortization Expense		0		0
Operating (Loss) Income		(1,347)		(2,818)
Interest and Other Expense		0		0
(Loss) Income Before Provision for Income Taxes		(1,347)		(2,818)
Provision for income taxes		(316)		(643)
Net (Loss) Income		$ (1,031)		$ (2,175)
Income per share attributable to common stockholders:
Basic (in dollars per share)		$ (0.03)		$ (0.07)
Diluted (in dollars per share)		$ (0.03)		$ (0.07)
Weighted average common shares outstanding:
Basic (in shares)		30,547		30,530
Diluted (in shares)		30,824		30,731