Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data
Year 2014 Quarter Ended
 
March 31, 2014
 
June 30, 2014
 
September 30, 2014
 
December 31, 2014
 
Total 2014
Contract revenue
 
$
378,129

 
$
423,154

 
$
448,134

 
$
344,953

 
$
1,594,370

Contract income
 
18,061

 
21,448

 
38,631

 
18,612

 
96,752

Operating income (loss)
 
(9,878
)
 
(6,307
)
 
3,175

 
(15,437
)
 
(28,447
)
Loss from continuing operations before income taxes
 
(17,565
)
 
(14,889
)
 
(4,643
)
 
(37,282
)
 
(74,379
)
Income (loss) from continuing operations
 
(42,416
)
 
(5,058
)
 
15,305

 
(42,439
)
 
(74,608
)
Income (loss) from discontinued operations, net of provision for income taxes
 
17,426

 
(10,453
)
 
(18,664
)
 
6,472

 
(5,219
)
Net loss
 
$
(24,990
)
 
$
(15,511
)
 
$
(3,359
)
 
$
(35,967
)
 
$
(79,827
)
Basic income (loss) per share attributable to Company shareholders:
 
 
 
 
 
 
 
 
 
 
Income (loss) from continuing operations
 
$
(0.87
)
 
$
(0.11
)
 
$
0.31

 
$
(0.86
)
 
$
(1.51
)
Income (loss) from discontinued operations
 
0.36

 
(0.21
)
 
(0.38
)
 
0.14

 
(0.11
)
Net loss
 
$
(0.51
)
 
$
(0.32
)
 
$
(0.07
)
 
$
(0.72
)
 
$
(1.62
)
Diluted income (loss) per share attributable to Company shareholders:
 
 
 
 
 
 
 
 
 
 
Income (loss) from continuing operations
 
$
(0.87
)
 
$
(0.11
)
 
$
0.30

 
$
(0.86
)
 
$
(1.51
)
Income (loss) from discontinued operations
 
0.36

 
(0.21
)
 
(0.37
)
 
0.14

 
(0.11
)
Net loss
 
$
(0.51
)
 
$
(0.32
)
 
$
(0.07
)
 
$
(0.72
)
 
$
(1.62
)
Weighted average number of common shares outstanding
 
 
 
 
 
 
 
 
 
 
Basic
 
48,847,349

 
49,336,581

 
49,414,847

 
49,630,085

 
49,310,044

Diluted
 
48,847,349

 
49,336,581

 
50,226,661

 
49,630,085

 
49,310,044

Selected unaudited quarterly financial data for the year ended December 31, 2015 and 2014 is presented below (in thousands).
Year 2015 Quarter Ended
 
March 31, 2015
 
June 30, 2015
 
September 30, 2015
 
December 31, 2015
 
Total 2015
Contract revenue
 
$
250,354

 
$
218,789

 
$
222,191

 
$
217,660

 
$
908,994

Contract income
 
7,850

 
11,578

 
13,336

 
7,990

 
40,754

Operating loss
 
(21,285
)
 
(13,038
)
 
(12,367
)
 
(5,408
)
 
(52,098
)
Loss from continuing operations before income taxes
 
(65,548
)
 
(19,920
)
 
(19,454
)
 
(13,658
)
 
(118,580
)
Income (loss) from continuing operations
 
(44,944
)
 
(19,403
)
 
(19,411
)
 
19,209

 
(64,549
)
Income from discontinued operations, net of provision for income taxes
 
35,120

 
517

 
2,212

 
58,183

 
96,032

Net income (loss)
 
$
(9,824
)
 
$
(18,886
)
 
$
(17,199
)
 
$
77,392

 
$
31,483

Basic income (loss) per share attributable to Company shareholders:
 
 
 
 
 
 
 
 
 
 
Income (loss) from continuing operations
 
$
(0.90
)
 
$
(0.33
)
 
$
(0.32
)
 
$
0.32

 
$
(1.12
)
Income from discontinued operations
 
0.70

 
0.01

 
0.03

 
0.96

 
1.66

Net income (loss)
 
$
(0.20
)
 
$
(0.32
)
 
$
(0.29
)
 
$
1.28

 
$
0.54

Diluted income (loss) per share attributable to Company shareholders:
 
 
 
 
 
 
 
 
 
 
Income (loss) from continuing operations
 
$
(0.90
)
 
$
(0.33
)
 
$
(0.32
)
 
$
0.31

 
$
(1.12
)
Income from discontinued operations
 
0.70

 
0.01

 
0.03

 
0.95

 
1.66

Net income (loss)
 
$
(0.20
)
 
$
(0.32
)
 
$
(0.29
)
 
$
1.26

 
$
0.54

Weighted average number of common shares outstanding
 
 
 
 
 
 
 
 
 
 
Basic
 
49,819,388

 
60,227,495

 
60,335,717

 
60,510,199

 
57,759,988

Diluted
 
49,819,388

 
60,227,495

 
60,335,717

 
61,091,783

 
57,759,988