CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 75,431	$ 75,177	$ 56,039
Adjustments to reconcile net income to cash provided by operating activities:
Reserve related to note receivable	1,925	0	0
Impairment of equity method investment	13,684	0	0
Deferred income tax provision, net	3,081	2,425	(2,298)
Provision for credit losses	(126)	11	2,130
Depreciation and amortization	4,427	4,500	5,255
Stock-based compensation expense	17,655	13,999	11,595
Loss (gain) on disposal or impairment of assets	191	(1,929)	1,822
Noncash lease expense	5,683	5,509	5,499
Loss on equity method investment	3,824	2,480	1,681
Defined benefit pension plans expense	0	2,157	842
Other	(50)	1,036	1,056
(Increase) decrease in operating assets
Trade receivables, net	(4,049)	(36,960)	(12,863)
Increase (Decrease) in Other Operating Assets	(9,199)	(9,779)	(4,485)
Increase (decrease) in operating liabilities
Accrued payroll costs	(22,003)	6,337	22,397
Payment of benefit under terminated pension plan	(19,965)	0	0
Other liabilities	20,296	7,935	20,489
Cash provided by operating activities	90,805	72,898	109,159
Cash flows from investing activities:
Capital expenditures	(8,109)	(6,441)	(6,475)
Equity method investment	(500)	(9,000)	(4,000)
Note receivable issued to our joint venture	(6,750)	0	0
Cash proceeds received from Company-owned life insurance	1,077	0	0
Net proceeds from the sale of assets held for sale	0	23,742	3,548
Cash (used in) provided by investing activities	(14,282)	8,301	(6,927)
Cash flows from financing activities:
Proceeds from credit facility	38,200	0	35,000
Payments on credit facility	(112,600)	0	0
Repurchases of common stock	(74,913)	(66,210)	(35,613)
Cash dividends	(24,027)	(20,120)	(16,787)
Payments on other financing arrangements	(51)	(1,366)	(1,177)
Cash used in financing activities	(173,391)	(87,696)	(18,577)
Change in cash and cash equivalents	(96,868)	(6,497)	83,655
Cash and cash equivalents at beginning of year	96,989	103,486	19,831
Cash and cash equivalents at end of year	121	96,989	103,486
Cash paid during the year for:
Income taxes	16,579	24,277	21,737
Operating lease liabilities	6,992	7,468	7,330
Interest, net	885	2,453	2,574
Non-Cash Financing and Investing Transactions:
ROU assets obtained from operating leases	9,997	5,098	5,695
Unsettled repurchases of common stock	974	181	0
Employee stock purchase plan	$ 1,054	$ 762	$ 549