Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

Pay Versus Performance

The following table and supporting graphics below set out information about the relationship between “executive compensation actually paid” and certain financial performance measures of the Company for fiscal years ended December 31, 2024, 2023, 2022, 2021 and 2020, as required under Item 402(v) of Regulation S-K. The information set forth below was not used by the Compensation Committee in setting compensation for our Named Executive Officers as set forth in the Summary Compensation Table.

																Value of Initial Fixed $100 Investment Based On:
	Year (a)			Summary Compensation Table Total for PEO(1) (b)			Compensation Actually Paid to PEO(2) (c)			Average Summary Compensation Table Total for Non-PEO NEOs(3) (d)			Average Compensation Actually Paid to Non-PEO NEOs(3)(4) (e)			TSR(5) (f)			Peer Group TSR(6) (g)			Net Income (in 000s)(7) (h)			EBITDA as a Percent of Gross Margin(8) (i)
	2024			$3,964,450			$4,606,408			$1,678,027			$1,876,218			$173.72			$171.24			$103,993			63.8%
	2023			$2,609,274			$​4,604,521			$1,503,824			$2,565,427			$179.22			$168.12			$167,528			​70.6%
	2022			$5,821,094			$6,165,035			$2,113,244			$2,348,334			$154.93			$140.02			$356,948			70.6%
	​2021			$5,724,633			$12,482,793			$2,011,784			$4,086,226			$164.21			$165.47			$171,474			61.5%
	2020			$3,168,894			$4,190,394			$1,492,090			$1,901,498			$111.11			$130.86			$73,559			54.0%

1.
Reflects compensation amounts reported in the “Summary Compensation Table” for our principal executive officer (“PEO”), Phillip D. Yeager (in 2023 and 2024) and former CEO (and current Executive Chairman), David P. Yeager (in 2022, 2021 and 2020).

2.
“Compensation actually paid” to our PEO in 2024 reflects the amount set forth in column (b) of the table above, reconciled as set forth in the table below to the amount set forth in column (c) of the table above, as determined in accordance with SEC rules. The dollar amounts reflected in column (b) of the table above do not reflect the actual amount of compensation earned by or paid to our PEO during the applicable year. For information regarding the decisions made by our Compensation Committee regarding the PEO’s compensation for each fiscal year, please see the Compensation Discussion & Analysis sections of the proxy statements reporting pay for the fiscal years covered in the table above.

	Year			2024
	PEO			P. Yeager
	SCT Total Compensation			$3,964,450
	Less: Stock award values reported in SCT for the Covered Year			$(2,400,342)
	Plus: Year End Fair Value for Stock Awards Granted in the Covered Year			$3,235,505
	Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years			$(172,962)
	Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year			$(20,243)
	Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year			​—
	Compensation Actually Paid			$4,606,408

Equity Valuations: Performance-based restricted share grant date fair values are calculated using the stock price as of date of grant assuming target performance. Adjustments have been made using the stock price and performance accrual modifier as of year-end and as of the date of vest. Time-based restricted share grant date fair values are calculated using the stock price as of date of grant. Adjustments have been made using the stock price as of year-end and as of each date of vest.

3.
Reflects compensation amounts reported in the “Summary Compensation Table” of the proxy statements reporting pay for the fiscal years covered in the table above for the following non-PEO NEOs:

2024: David P. Yeager, Kevin Beth, Brian D. Alexander, and Thomas P. LaFrance

2023: David P. Yeager, Geoffrey F. DeMartino, Brian D. Alexander, and Thomas P. LaFrance

2022: Phillip D. Yeager, Geoffrey F. DeMartino, Vincent Paperiello, and Thomas P. LaFrance

2021: Phillip D. Yeager, Geoffrey F. DeMartino, Vava R. Dimond, and Vincent Paperiello

2020: Phillip D. Yeager, Terri A. Pizzuto, Geoffrey F. DeMartino, Vava R. Dimond and Douglas G. Beck

4.
“Average compensation actually paid” to our non-PEO NEOs in 2024 reflects the amount set forth in column (d) of the table above, reconciled as set forth in the table below to the amount set forth in column (e) of the table above, as determined in accordance with SEC rules. The dollar amounts reflected in column (d) of the table above do not reflect the actual amount of compensation earned by or paid to our non-PEO NEOs during the applicable year. For information regarding the decisions made by our Compensation Committee regarding the non-PEO NEOs’ compensation for each fiscal year, please the Compensation Discussion and Analysis sections of the proxy statements reporting pay for the fiscal years covered in the table above.

	Year			2024 Average
	Non-PEO NEOs			See Footnote 3 above
	SCT Total Compensation			$1,678,027
	Less: Stock award values reported in SCT for the Covered Year			$(850,220)
	Plus: Year End Fair Value for Stock Awards Granted in the Covered Year			$1,146,041
	Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years			$(87,572)
	Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year			$(10,058)
	Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year			​—
	Compensation Actually Paid			$1,876,218

Equity Valuations: Performance-based restricted share grant date fair values are calculated using the stock price as of date of grant assuming target performance. Adjustments have been made using the stock price and performance accrual modifier as of year-end and as of the date of vest. Time-based restricted share grant date fair values are calculated using the stock price as of date of grant. Adjustments have been made using the stock price as of year-end and as of each date of vest.

5.
For the relevant fiscal year, represents the cumulative total shareholder return (TSR) of the Company for the measurement periods ending on December 31 of each of 2024, 2023, 2022, 2021 and 2020, respectively.

6.
For the relevant fiscal year, represents the cumulative TSR of the Nasdaq US Benchmark Industrial Transportation Index for the measurement periods ending on December 31 of each of 2024, 2023, 2022, 2021 and 2020, respectively.

7.
Reflects “Net Income” in the company’s Consolidated Statements Income and Comprehensive Income included in the Company’s Annual Reports on Form 10-K for each of the years ended December 31, 2023, 2022, 2021 and 2020.

8.
Company-selected Measure is EBITDA as a percent of gross margin, which is described below.

Company Selected Measure Name

EBITDA as a percent of gross margin

Named Executive Officers, Footnote

1.
Reflects compensation amounts reported in the “Summary Compensation Table” for our principal executive officer (“PEO”), Phillip D. Yeager (in 2023 and 2024) and former CEO (and current Executive Chairman), David P. Yeager (in 2022, 2021 and 2020).

3.
Reflects compensation amounts reported in the “Summary Compensation Table” of the proxy statements reporting pay for the fiscal years covered in the table above for the following non-PEO NEOs:

2024: David P. Yeager, Kevin Beth, Brian D. Alexander, and Thomas P. LaFrance

2023: David P. Yeager, Geoffrey F. DeMartino, Brian D. Alexander, and Thomas P. LaFrance

2022: Phillip D. Yeager, Geoffrey F. DeMartino, Vincent Paperiello, and Thomas P. LaFrance

2021: Phillip D. Yeager, Geoffrey F. DeMartino, Vava R. Dimond, and Vincent Paperiello

2020: Phillip D. Yeager, Terri A. Pizzuto, Geoffrey F. DeMartino, Vava R. Dimond and Douglas G. Beck

Peer Group Issuers, Footnote

6.
For the relevant fiscal year, represents the cumulative TSR of the Nasdaq US Benchmark Industrial Transportation Index for the measurement periods ending on December 31 of each of 2024, 2023, 2022, 2021 and 2020, respectively.

PEO Total Compensation Amount

$ 3,964,450

$ 2,609,274

$ 5,821,094

$ 5,724,633

$ 3,168,894

PEO Actually Paid Compensation Amount

$ 4,606,408

4,604,521

6,165,035

12,482,793

4,190,394

Adjustment To PEO Compensation, Footnote

2.
“Compensation actually paid” to our PEO in 2024 reflects the amount set forth in column (b) of the table above, reconciled as set forth in the table below to the amount set forth in column (c) of the table above, as determined in accordance with SEC rules. The dollar amounts reflected in column (b) of the table above do not reflect the actual amount of compensation earned by or paid to our PEO during the applicable year. For information regarding the decisions made by our Compensation Committee regarding the PEO’s compensation for each fiscal year, please see the Compensation Discussion & Analysis sections of the proxy statements reporting pay for the fiscal years covered in the table above.

	Year			2024
	PEO			P. Yeager
	SCT Total Compensation			$3,964,450
	Less: Stock award values reported in SCT for the Covered Year			$(2,400,342)
	Plus: Year End Fair Value for Stock Awards Granted in the Covered Year			$3,235,505
	Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years			$(172,962)
	Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year			$(20,243)
	Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year			​—
	Compensation Actually Paid			$4,606,408

Equity Valuations: Performance-based restricted share grant date fair values are calculated using the stock price as of date of grant assuming target performance. Adjustments have been made using the stock price and performance accrual modifier as of year-end and as of the date of vest. Time-based restricted share grant date fair values are calculated using the stock price as of date of grant. Adjustments have been made using the stock price as of year-end and as of each date of vest.

Non-PEO NEO Average Total Compensation Amount

$ 1,678,027

1,503,824

2,113,244

2,011,784

1,492,090

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,876,218

2,565,427

2,348,334

4,086,226

1,901,498

Adjustment to Non-PEO NEO Compensation Footnote

4.
“Average compensation actually paid” to our non-PEO NEOs in 2024 reflects the amount set forth in column (d) of the table above, reconciled as set forth in the table below to the amount set forth in column (e) of the table above, as determined in accordance with SEC rules. The dollar amounts reflected in column (d) of the table above do not reflect the actual amount of compensation earned by or paid to our non-PEO NEOs during the applicable year. For information regarding the decisions made by our Compensation Committee regarding the non-PEO NEOs’ compensation for each fiscal year, please the Compensation Discussion and Analysis sections of the proxy statements reporting pay for the fiscal years covered in the table above.

	Year			2024 Average
	Non-PEO NEOs			See Footnote 3 above
	SCT Total Compensation			$1,678,027
	Less: Stock award values reported in SCT for the Covered Year			$(850,220)
	Plus: Year End Fair Value for Stock Awards Granted in the Covered Year			$1,146,041
	Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years			$(87,572)
	Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year			$(10,058)
	Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year			​—
	Compensation Actually Paid			$1,876,218

Equity Valuations: Performance-based restricted share grant date fair values are calculated using the stock price as of date of grant assuming target performance. Adjustments have been made using the stock price and performance accrual modifier as of year-end and as of the date of vest. Time-based restricted share grant date fair values are calculated using the stock price as of date of grant. Adjustments have been made using the stock price as of year-end and as of each date of vest.

Compensation Actually Paid vs. Total Shareholder Return

Compensation Actually Paid vs. Net Income

Compensation Actually Paid vs. Company Selected Measure

Total Shareholder Return Vs Peer Group

Tabular List, Table

Listed below are the financial performance measures which in our assessment represent the most important financial performance measures we use to link compensation actually paid to our Named Executive Officers, for 2024, to Company performance.

	Measure			Explanation
	EBITDA as a percent of gross margin			A non-GAAP financial measure that consists of EBITDA (as defined below in this table) divided by Gross Margin (as defined below in this table)
	Diluted EPS			Diluted Earnings per Share
	EBITDA			A non-GAAP financial measure that consists of income from continuing operations before interest, income taxes, depreciation and amortization
	Gross Margin			Revenue minus transportation costs
	Operating income			Revenue minus transportation costs and costs and expenses

Total Shareholder Return Amount

$ 173.72

179.22

154.93

164.21

111.11

Peer Group Total Shareholder Return Amount

171.24

168.12

140.02

165.47

130.86

Net Income (Loss)

$ 103,993,000

$ 167,528,000

$ 356,948,000

$ 171,474,000

$ 73,559,000

Company Selected Measure Amount

0.638

0.706

0.706

0.615

0.54

PEO Name

Phillip D. Yeager

Phillip D. Yeager

David P. Yeager

David P. Yeager

David P. Yeager

Measure:: 1

Pay vs Performance Disclosure

Name

EBITDA as a percent of gross margin

Non-GAAP Measure Description

A non-GAAP financial measure that consists of EBITDA (as defined below in this table) divided by Gross Margin (as defined below in this table)

Measure:: 2

Pay vs Performance Disclosure

Name

Diluted EPS

Measure:: 3

Pay vs Performance Disclosure

Name

EBITDA

Non-GAAP Measure Description

A non-GAAP financial measure that consists of income from continuing operations before interest, income taxes, depreciation and amortization

Measure:: 4

Pay vs Performance Disclosure

Name

Gross Margin

Measure:: 5

Pay vs Performance Disclosure

Name

Operating income

PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (2,400,342)

PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,235,505

PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(172,962)

PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(20,243)

PEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(850,220)

Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,146,041

Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(87,572)

Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(10,058)

Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 0