Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net earnings	$ 76,168	$ 84,868
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	35,797	43,022
Amortization of debt issuance costs	1,801	1,438
Provision for losses on accounts receivable	1,994	1,231
Goodwill, Impairment Loss	0	7,585
Loss (gain) on derivatives, net	132	194
Gain (loss) on sale of property, plant and equipment	846	400
Stock-based compensation expense	9,401	7,021
Deferred income taxes	93	1,513
Changes in assets and liabilities:
Accounts receivable, net	16,583	52,260
Inventories	6,548	9,260
Prepaid expenses and other	(12,680)	(16,877)
Other assets	(1,518)	(1,038)
Accounts payable	(17,176)	(51,616)
Progress billings	(1,511)	577
Accrued expenses	(7,340)	(21,626)
Other non-current liabilities	(3,317)	(7,018)
Total adjustments	29,653	26,326
Net cash provided by (used in) operating activities	105,821	111,194
Cash flows from investing activities:
Additions to property, plant and equipment	(14,746)	(15,783)
Digital acquisitions, net of cash acquired	0	(18,344)
Proceeds from sale of property, plant and equipment	5,288	256
Net cash provided by (used in) investing activities	(9,458)	(33,871)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of long-term debt	(51,161)	(11,250)
Dividends paid on common shares and restricted stock	(35,732)	0
Repurchases of common stock	(60,325)	(87,130)
Proceeds from Stock Options Exercised	31,205	8,956
Net cash provided (used in) by financing activities	(116,013)	(89,424)
Effect of exchange rate changes on cash and cash equivalents	(76)	474
Net increase (decrease) in cash and cash equivalents	(19,726)	(11,627)
Cash and cash equivalents at beginning of period	94,711	101,971
Cash and cash equivalents at end of period	74,985	90,344
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	24,689	24,923
Cash paid during the period for income taxes	$ 55,987	$ 67,016