Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information (Details)

v3.4.0.3
Business Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]    
Revenues $ 133,776 $ 115,433
Interest income 12 151
Interest expense 1,474 1,277
Depreciation and amortization of intangible assets 5,421 5,227
Income (loss) before taxes, excluding unallocated corporate activity 8,672 (582)
Operating Segments | U.S. Regions    
Segment Reporting Information [Line Items]    
Revenues 41,621 46,434
Interest income 0 0
Interest expense 0 0
Depreciation and amortization of intangible assets 137 205
Income (loss) before taxes, excluding unallocated corporate activity 191 1,917
Operating Segments | U.S. Federal    
Segment Reporting Information [Line Items]    
Revenues 38,669 24,143
Interest income 2 0
Interest expense 99 0
Depreciation and amortization of intangible assets 523 306
Income (loss) before taxes, excluding unallocated corporate activity 6,400 3,258
Operating Segments | Canada    
Segment Reporting Information [Line Items]    
Revenues 14,807 10,895
Interest income 0 1
Interest expense 347 329
Depreciation and amortization of intangible assets 239 243
Income (loss) before taxes, excluding unallocated corporate activity 541 (5,008)
Operating Segments | Small-Scale Infrastructure    
Segment Reporting Information [Line Items]    
Revenues 20,693 13,603
Interest income 9 150
Interest expense 1,028 948
Depreciation and amortization of intangible assets 3,849 3,466
Income (loss) before taxes, excluding unallocated corporate activity 2,321 237
Operating Segments | Other    
Segment Reporting Information [Line Items]    
Revenues 17,986 20,358
Interest income 1 0
Interest expense 0 0
Depreciation and amortization of intangible assets 673 1,007
Income (loss) before taxes, excluding unallocated corporate activity (781) (986)
Consolidation, Eliminations    
Segment Reporting Information [Line Items]    
Unallocated corporate activity (7,727) (6,508)
Consolidation, Eliminations | U.S. Regions    
Segment Reporting Information [Line Items]    
Unallocated corporate activity 0 0
Consolidation, Eliminations | U.S. Federal    
Segment Reporting Information [Line Items]    
Unallocated corporate activity 0 0
Consolidation, Eliminations | Canada    
Segment Reporting Information [Line Items]    
Unallocated corporate activity 0 0
Consolidation, Eliminations | Small-Scale Infrastructure    
Segment Reporting Information [Line Items]    
Unallocated corporate activity 0 0
Consolidation, Eliminations | Other    
Segment Reporting Information [Line Items]    
Unallocated corporate activity $ 0 $ 0