Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net earnings	$ 48,455	$ 48,128
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	24,705	29,097
Amortization of debt issuance costs	1,553	858
Provision for losses on accounts receivable	1,093	883
Goodwill, Impairment Loss	0	7,585
Loss (gain) on derivatives, net	153	(1,049)
Gain (loss) on sale of property, plant and equipment	946	405
Stock-based compensation expense	6,495	4,801
Deferred income taxes	68	826
Changes in assets and liabilities:
Accounts receivable, net	37,781	73,243
Inventories	7,201	10,754
Prepaid expenses and other	(18,630)	(16,417)
Other assets	(1,293)	292
Accounts payable	(13,311)	(79,017)
Progress billings	(2,336)	(679)
Accrued expenses	(8,031)	(9,124)
Other non-current liabilities	(1,430)	(783)
Total adjustments	34,964	21,675
Net cash provided by (used in) operating activities	83,419	69,803
Cash flows from investing activities:
Additions to property, plant and equipment	(10,408)	(11,770)
Digital acquisitions, net of cash acquired	0	(18,362)
Proceeds from sale of property, plant and equipment	5,188	217
Net cash provided by (used in) investing activities	(5,220)	(29,915)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of long-term debt	(22,557)	(7,500)
Dividends paid on common shares and restricted stock	(24,035)	0
Repurchases of common stock	(53,412)	(65,900)
Proceeds from issuance of common stock	16,514	6,305
Net cash provided (used in) by financing activities	(83,490)	(67,095)
Effect of exchange rate changes on cash and cash equivalents	(775)	473
Net increase (decrease) in cash and cash equivalents	(6,066)	(26,734)
Cash and cash equivalents at beginning of period	94,711	101,971
Cash and cash equivalents at end of period	88,645	75,237
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	13,575	13,675
Cash paid during the period for income taxes	$ 39,951	$ 48,744