Annual report pursuant to Section 13 and 15(d)

Segment Reporting (Details)

v3.8.0.1
Segment Reporting (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]                      
Number of principal reporting segments                 4    
External revenues $ 306,116 $ 280,201 $ 267,518 $ 246,982 $ 264,793 $ 249,552 $ 238,637 $ 229,548 $ 1,100,816 $ 982,530 $ 959,125
Depreciation and amortization                 41,055 38,210 37,157
Share-based Compensation                 8,103 8,334 7,486
Goodwill and Intangible Asset Impairment                 0 42,442 0
Interest expense                 1,209 1,597 2,047
Income tax expense (benefit)                 20,131 30,716 24,092
Net income (loss) 35,374 18,155 19,550 14,243 12,706 11,931 (10,066) 13,099 87,321 27,670 55,575
Operating Income (Loss) 28,776 $ 26,898 $ 29,809 $ 23,189 28,223 $ 24,700 $ (14,348) $ 21,404 108,672 59,979 81,772
Total assets 687,716       641,291       687,716 641,291 699,932
Additions to Other Assets, Amount                 38,265 42,186 40,495
Expedited LTL [Member]                      
Segment Reporting Information [Line Items]                      
External revenues                 616,245 567,711 573,476
Revenue from Related Parties                 3,534 3,067 3,550
Depreciation and amortization                 22,103 21,919 21,125
Share-based Compensation                 6,776 7,209 6,088
Interest expense                 3 1,687 1,959
Operating Income (Loss)                 88,142 83,518 79,193
Total assets 629,091       632,698       629,091 632,698 641,360
Additions to Other Assets, Amount                 36,650 37,501 29,995
Truckload Premium Services [Member]                      
Segment Reporting Information [Line Items]                      
External revenues                 171,970 163,254 152,251
Revenue from Related Parties                 7,350 1,018 1,080
Depreciation and amortization                 6,328 6,441 6,206
Share-based Compensation                 378 332 840
Goodwill and Intangible Asset Impairment                   42,442  
Interest expense                 2 3 5
Operating Income (Loss)                 3,248 (35,405) 13,288
Total assets 65,829       53,695       65,829 53,695 89,312
Additions to Other Assets, Amount                 33 1,828 5,972
Pool Distribution [Member]                      
Segment Reporting Information [Line Items]                      
External revenues                 163,932 148,054 128,826
Revenue from Related Parties                 289 607 1,169
Depreciation and amortization                 6,773 5,975 6,003
Share-based Compensation                 387 334 300
Operating Income (Loss)                 6,378 3,633 3,820
Total assets 55,970       50,271       55,970 50,271 46,970
Additions to Other Assets, Amount                 1,068 2,637 3,983
Intermodal [Member]                      
Segment Reporting Information [Line Items]                      
External revenues                 148,669 103,511 103,977
Revenue from Related Parties                 238 160 315
Depreciation and amortization                 5,848 3,876 3,773
Share-based Compensation                 562 459 258
Interest expense                 48 83 83
Operating Income (Loss)                 12,673 10,956 11,949
Total assets 147,773       129,714       147,773 129,714 118,081
Additions to Other Assets, Amount                 514 220 545
Business Intersegment, Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
External revenues                     595
Revenue from Related Parties                 (11,411) (4,852) (6,114)
Depreciation and amortization                 3 (1) 50
Share-based Compensation                 0    
Interest expense                 1,156 (176)  
Operating Income (Loss)                 (1,769) (2,723) (26,478)
Total assets $ (210,947)       $ (225,087)       $ (210,947) $ (225,087) $ (195,791)