UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 5,902	$ 3,650
Deferred income tax provision, net	1,758	3,343
Adjustments to reconcile net income to cash (used in) provided by operating activities:
Provision for bad debts on accounts receivable	392	356
Depreciation and amortization	2,103	2,337
Stock-based compensation expense	2,064	1,944
Defined benefit pension plans expense	239	497
Loss on deferred compensation plan investments, net	104	171
Other	272	56
(Increase) decrease in operating assets
Trade receivables, net	(21,665)	(11,867)
Income tax refund receivable	(725)	459
Prepaid expenses and other current assets	(20)	(1,404)
Other assets, net	(127)	(95)
(Decrease) increase in operating liabilities
Accounts payable and other current liabilities	(2,113)	(2,548)
Accrued payroll costs	1,593	4,604
Income taxes payable	623	799
Other long-term liabilities	(913)	1,039
Cash (used in) provided by operating activities	(10,513)	3,341
Cash flows from investing activities:
Capital expenditures	(2,272)	(1,294)
Cash used in investing activities	(2,272)	(1,294)
Cash flows from financing activities:
Proceeds from credit facility	274,553	251,095
Payments on credit facility	(254,134)	(228,113)
Payments on other financing arrangements	(526)	(485)
Proceeds from exercise of stock options	72	109
Repurchases of common stock	(2,887)	(22,084)
Cash dividend	(3,037)	(3,146)
Cash provided by (used in) financing activities	14,041	(2,624)
Change in cash and cash equivalents	1,256	(577)
Cash and cash equivalents at beginning of period	1,482	1,497
Cash and cash equivalents at end of period	$ 2,738	$ 920