Guarantor and Non-Guarantor Subsidiaries (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	$ (13,301,000)	$ (34,602,000)
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets	(34,269,000)	(29,198,000)
Acquisition of businesses, net of cash acquired		(1,675,000)
Return on equity investments	2,120,000
Proceeds from sale of fixed assets	218,000	4,230,000
Net cash provided by (used in) investing activities	(31,931,000)	(26,643,000)
FINANCING ACTIVITIES
Increase in short-term debt	4,897,000	2,433,000
Principal payments on long-term debt	(1,763,000)	(1,799,000)
Purchase of noncontrolling interest	(1,911,000)
Repurchase of preferred stock		(4,870,000)
Repurchase of common stock	(11,098,000)
Other	(8,000)	16,000
Net cash provided by (used in) financing activities	(11,534,000)	(5,875,000)
Effects of exchange rate changes on cash and cash equivalents	2,924,000	1,329,000
Changes in cash and cash equivalents	(53,842,000)	(65,791,000)
Cash and cash equivalents at beginning of period	270,555,000	361,745,000
Cash and cash equivalents at end of period	216,713,000	295,954,000
Depreciation and amortization	29,800,000	31,600,000
Parent [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	1,700,000	1,700,000
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets
Acquisition of businesses, net of cash acquired
Return on equity investments
Proceeds from sale of fixed assets
Net cash provided by (used in) investing activities
FINANCING ACTIVITIES
Increase in short-term debt
Principal payments on long-term debt
Purchase of noncontrolling interest
Repurchase of preferred stock
Repurchase of common stock
Other	(1,700,000)	(1,700,000)
Net cash provided by (used in) financing activities	(1,700,000)	(1,700,000)
Effects of exchange rate changes on cash and cash equivalents
Changes in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Depreciation and amortization
Issuer [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	(4,400,000)	1,000,000
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets	(6,400,000)	(6,500,000)
Acquisition of businesses, net of cash acquired
Return on equity investments
Proceeds from sale of fixed assets
Net cash provided by (used in) investing activities	(6,400,000)	(6,500,000)
FINANCING ACTIVITIES
Increase in short-term debt
Principal payments on long-term debt
Purchase of noncontrolling interest
Repurchase of preferred stock		(4,900,000)
Repurchase of common stock	(11,100,000)
Other	(2,800,000)	(1,500,000)
Net cash provided by (used in) financing activities	(13,900,000)	(6,400,000)
Effects of exchange rate changes on cash and cash equivalents
Changes in cash and cash equivalents	(24,700,000)	(11,900,000)
Cash and cash equivalents at beginning of period	177,500,000	189,600,000
Cash and cash equivalents at end of period	152,800,000	177,700,000
Depreciation and amortization	7,100,000	7,300,000
Guarantors [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	(2,400,000)	(500,000)
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets	(4,100,000)	(3,500,000)
Acquisition of businesses, net of cash acquired
Return on equity investments	2,100,000
Proceeds from sale of fixed assets		4,000,000
Net cash provided by (used in) investing activities	(2,000,000)	500,000
FINANCING ACTIVITIES
Increase in short-term debt
Principal payments on long-term debt
Purchase of noncontrolling interest
Repurchase of preferred stock
Repurchase of common stock
Other
Net cash provided by (used in) financing activities
Effects of exchange rate changes on cash and cash equivalents
Changes in cash and cash equivalents	(4,400,000)
Cash and cash equivalents at beginning of period	4,400,000
Cash and cash equivalents at end of period
Depreciation and amortization	3,400,000	3,900,000
Non-Guarantors [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	(8,200,000)	(36,800,000)
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets	(23,800,000)	(19,200,000)
Acquisition of businesses, net of cash acquired		(1,700,000)
Return on equity investments
Proceeds from sale of fixed assets	200,000	300,000
Net cash provided by (used in) investing activities	(23,600,000)	(20,600,000)
FINANCING ACTIVITIES
Increase in short-term debt	4,900,000	2,400,000
Principal payments on long-term debt	(1,800,000)	(1,800,000)
Purchase of noncontrolling interest	(1,900,000)
Repurchase of preferred stock
Repurchase of common stock
Other	2,900,000	1,600,000
Net cash provided by (used in) financing activities	4,100,000	2,200,000
Effects of exchange rate changes on cash and cash equivalents	2,900,000	1,400,000
Changes in cash and cash equivalents	(24,800,000)	(53,800,000)
Cash and cash equivalents at beginning of period	88,700,000	172,100,000
Cash and cash equivalents at end of period	63,900,000	118,300,000
Depreciation and amortization	19,300,000	20,400,000
Eliminations [Member]
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities
INVESTING ACTIVITIES
Capital expenditures, including other intangible assets
Acquisition of businesses, net of cash acquired
Return on equity investments
Proceeds from sale of fixed assets
Net cash provided by (used in) investing activities
FINANCING ACTIVITIES
Increase in short-term debt
Principal payments on long-term debt
Purchase of noncontrolling interest
Repurchase of preferred stock
Repurchase of common stock
Other
Net cash provided by (used in) financing activities
Effects of exchange rate changes on cash and cash equivalents
Changes in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Depreciation and amortization