Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 40,391	$ 31,652
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	11,563	11,087
Depreciation and amortization	12,729	13,598
Changes to value of life insurance policies	(48)	(497)
Deferred income taxes	6,766	(1,256)
Other non-cash items	(561)	(1,670)
Changes in assets and liabilities:
Accounts receivable	(14,527)	34,700
Inventories	(1,926)	805
Prepaid expenses and other current assets	(3,675)	(2,344)
Other assets	(1,083)	733
Accounts payable	8,443	(3,826)
Accrued expenses	(12,459)	(6,079)
Increase (Decrease) in Deferred Revenue	1,356	(2,987)
Other long-term liabilities	1,507	(102)
Net cash provided by operating activities	48,476	73,814
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(9,362)	(5,302)
Patents and other intangibles	(203)	(99)
Proceeds from sale of assets	511	539
Premiums on life insurance	(863)	(970)
Net cash used in investing activities	(9,917)	(5,832)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(67,000)	(258,676)
Proceeds from debt borrowings	84,000	34,000
Excess tax benefits from stock-based compensation	0	(284)
Non-controlling interest - dividend	(27)	(211)
Payments of Dividends	(48,590)	(46,626)
Repurchase of common shares	(7,388)	(1,112)
Stock Issued During Period, Value, New Issues	0	197,211
Net cash used in financing activities	(39,005)	(75,698)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(446)	(7,716)
CASH AND CASH EQUIVALENTS, beginning of period	14,764	22,494
CASH AND CASH EQUIVALENTS, end of period	$ 14,318	$ 14,778