CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 32,773	$ 42,824	$ 90,915
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Gain on sale of discontinued operations	0	0	(64,600)
Deferred income tax provision, net	2,007	2,380	491
Provision for bad debts on accounts receivable	976	1,553	825
Depreciation and amortization	8,796	9,849	10,058
Stock-based compensation expense	6,705	5,819	3,028
Defined benefit pension and post-retirement plans expense	1,733	1,846	1,424
Excess tax benefit attributable to stock-based compensation	(376)	(551)	0
Loss on deferred compensation plan investments, net	597	77	446
Gain from Company-owned life insurance proceeds	0	0	(849)
Contingent consideration liability remeasurement	(42)	321	0
Other	321	308	(47)
(Increase) decrease in operating assets:
Trade receivables, net	(8,403)	4,223	(40,339)
Income tax refund receivable	354	2,785	4,409
Prepaid expenses and other current assets	(1,631)	1,110	530
Other assets, net	(495)	(298)	(27)
(Decrease) increase in operating liabilities:
Accounts payable and other current liabilities	(1,920)	1,788	5,653
Accrued payroll costs	(1,320)	(5,503)	(248)
Income taxes payable	(489)	(1,657)	(34,934)
Other long-term liabilities	(139)	3,306	(2,317)
Cash provided by (used in) operating activities	39,447	70,180	(25,582)
Cash flows from investing activities:
Capital expenditures	(12,420)	(8,328)	(6,010)
Acquisition, net of cash received	0	0	(2,611)
Proceeds from disposition of business	0	0	117,887
Proceeds from the disposition of assets held within the Rabbi Trust	0	445	2,668
Purchase of assets held within the Rabbi Trust	0	(481)	(2,436)
Proceeds from Company-owned life insurance	0	0	1,037
Cash (used in) provided by investing activities	(12,420)	(8,364)	110,535
Cash flows from financing activities:
Proceeds from credit facility	937,083	604,668	684,427
Payments on credit facility	(906,008)	(617,529)	(653,701)
Proceeds from other financing arrangements	1,783	2,914	0
Payments on other financing arrangements	(1,830)	(1,274)	(1,280)
Payments of deferred financing fees	(158)	0	(460)
Proceeds from exercise of stock options, net of shares tendered in payment of exercise	172	381	1,131
Excess tax benefit attributable to stock-based compensation	376	551	0
Repurchases of common stock	(46,013)	(38,471)	(101,771)
Cash dividend	(12,447)	(12,545)	(12,776)
Other	0	(252)	(160)
Cash used in financing activities	(27,042)	(61,557)	(84,590)
Change in cash and cash equivalents	(15)	259	363
Cash and cash equivalents at beginning of period	1,497	1,238	875
Cash and cash equivalents at end of period	$ 1,482	$ 1,497	$ 1,238