Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income	$ 55,567us-gaap_ProfitLoss	$ 21,686us-gaap_ProfitLoss	$ 6,583us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,792	27,967	30,133
Deferred income taxes	(9,731)us-gaap_DeferredIncomeTaxExpenseBenefit	2,298us-gaap_DeferredIncomeTaxExpenseBenefit	11,274us-gaap_DeferredIncomeTaxExpenseBenefit
Income from discontinued operations	(14,389)	(2,366)	(3,030)
Restructuring charges	1,637us-gaap_RestructuringCharges	3,793us-gaap_RestructuringCharges	4,942us-gaap_RestructuringCharges
Impairment charges	884us-gaap_AssetImpairmentCharges	3,049us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Gain on sale of facility and related land	0us-gaap_GainLossOnDispositionOfAssets	(4,775)us-gaap_GainLossOnDispositionOfAssets	0us-gaap_GainLossOnDispositionOfAssets
Gains on dispositions of property and other assets	(958)	(265)	(206)
Share-based compensation expense	2,930us-gaap_ShareBasedCompensation	5,221us-gaap_ShareBasedCompensation	7,232us-gaap_ShareBasedCompensation
Excess tax benefit from share-based compensation arrangements	(114)	(422)	(293)
Other non-cash items, net	5,386us-gaap_OtherNoncashIncomeExpense	4,870us-gaap_OtherNoncashIncomeExpense	10,157us-gaap_OtherNoncashIncomeExpense
Change in operating assets and liabilities (excluding the impact of acquisitions):
Receivables	(10,441)us-gaap_IncreaseDecreaseInReceivables	1,246us-gaap_IncreaseDecreaseInReceivables	142us-gaap_IncreaseDecreaseInReceivables
Inventories	(2,555)us-gaap_IncreaseDecreaseInInventories	7,663us-gaap_IncreaseDecreaseInInventories	195us-gaap_IncreaseDecreaseInInventories
Accounts payable	18,128	(15,436)	4,310
Restructuring liabilities	(5,276)us-gaap_PaymentsForRestructuring	(4,841)us-gaap_PaymentsForRestructuring	(4,694)us-gaap_PaymentsForRestructuring
Accrued compensation	3,663	(11,707)	1,631
Customer deposits	(6,406)	(20,965)	926
Income taxes payable	1,543	218	467
Other assets and liabilities, net	(12,570)	(11,179)	(583)
Net cash provided by operating activities	58,090	6,055	69,186
Cash flows from investing activities
Proceeds from possessory interest and personal property - discontinued operations	28,000	0	0
Proceeds from dispositions of property and other assets	1,109	464	322
Capital expenditures	(29,389)	(36,119)	(27,675)
Acquisition of businesses, net of cash acquired	(120,251)	(647)	(23,546)
Proceeds from sale of facility and related land	0	12,696	0
Proceeds from sale of land—discontinued operations	0	1,645	1,041
Proceeds from sale of short-term investments	0	0	384
Net cash used in investing activities	(120,531)	(21,961)	(49,474)
Cash flows from financing activities
Proceeds from borrowings	189,512us-gaap_ProceedsFromIssuanceOfDebt	20,000us-gaap_ProceedsFromIssuanceOfDebt	0us-gaap_ProceedsFromIssuanceOfDebt
Payments on debt and capital lease obligations	(61,461)	(11,362)	(2,685)
Dividends paid on common stock	(38,387)us-gaap_PaymentsOfDividendsCommonStock	(58,914)us-gaap_PaymentsOfDividendsCommonStock	(4,454)us-gaap_PaymentsOfDividendsCommonStock
Common stock purchased for treasury	(12,321)	(1,328)	(1,656)
Debt issuance costs	(1,671)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Excess tax benefit from share-based compensation arrangements	114	422	293
Proceeds from exercise of stock options	1,155	777	248
Net cash provided by (used in) financing activities	76,941	(50,405)	(8,254)
Effect of exchange rate changes on cash and cash equivalents	(3,331)	(2,039)	2,337
Net change in cash and cash equivalents	11,169	(68,350)	13,795
Cash and cash equivalents, beginning of year	45,821	114,171	100,376
Cash and cash equivalents, end of year	56,990	45,821	114,171
Supplemental disclosure of cash flow information
Cash paid for income taxes	8,389us-gaap_IncomeTaxesPaid	8,498us-gaap_IncomeTaxesPaid	8,386us-gaap_IncomeTaxesPaid
Cash paid for interest	1,703us-gaap_InterestPaid	1,006us-gaap_InterestPaid	1,103us-gaap_InterestPaid
Property and equipment acquired under capital leases	881us-gaap_CapitalLeaseObligationsIncurred	832us-gaap_CapitalLeaseObligationsIncurred	1,011us-gaap_CapitalLeaseObligationsIncurred
Property and equipment purchases in accounts payable and accrued liabilities	$ 780	$ 3,204	$ 4,822

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