Supplemental Guarantor Financial Information (Condensed Consolidating Statements Of Cash Flows) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	$ 200,402,000	$ 172,508,000	$ 20,732,000
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net	(148,567,000)	(119,459,000)	(40,681,000)
Proceeds from disposal of business, net of cash divested	(2,997,000)	97,728,000	0
Capital expenditures	(126,288,000)	(79,686,000)	(71,710,000)
Proceeds from sale of property and equipment	15,858,000	7,385,000	6,227,000
(Payments for) proceeds from other investments, net	(1,200,000)	(200,000)	4,400,000
Net cash used in investing activities	(263,211,000)	(94,316,000)	(101,848,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	(100,700,000)	74,000,000	60,000,000
(Repayments of) proceeds from other borrowings and capital lease obligations	(70,700,000)	(42,500,000)	(30,300,000)
Repurchase of common stock	0	(75,000,000)	(75,000,000)
Net financing activities and advances (to) from consolidated affiliates	0	0	0
Net cash provided by (used in) financing activities	58,993,000	(71,796,000)	(76,409,000)
Net (decrease) increase in cash and cash equivalents	(3,816,000)	6,396,000	(157,525,000)
Net effect of currency translation on cash	(24,000)	91,000	201,000
Cash and cash equivalents - beginning of period	26,767,000	20,280,000	177,604,000
Cash and cash equivalents - end of period	22,927,000	26,767,000	20,280,000
Cash and cash equivalents of discontinued operations	0	385,000	12,874,000
Cash and cash equivalents of continuing operations	22,927,000	26,382,000	7,406,000
Obligations [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	(32,400,000)	(34,100,000)	(51,300,000)
Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	12,700,000	5,800,000	20,200,000
Unsecured Debt [Member]
Cash flows provided by (used in) financing activities:
Proceeds from senior notes, net	250,000,000
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	0	0	0
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net	0	0	0
Proceeds from disposal of business, net of cash divested	0	0
Capital expenditures	0	0	0
Proceeds from sale of property and equipment	0	0	0
(Payments for) proceeds from other investments, net	0	0	0
Net cash used in investing activities	0	0	0
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	0	0	0
(Repayments of) proceeds from other borrowings and capital lease obligations	0	0	0
Repurchase of common stock		0	0
Net financing activities and advances (to) from consolidated affiliates	0	0	0
Net cash provided by (used in) financing activities	0	0	0
Net (decrease) increase in cash and cash equivalents	0	0	0
Net effect of currency translation on cash	0	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	0	0	0
Cash and cash equivalents of discontinued operations	0	0	0
Cash and cash equivalents of continuing operations	0	0	0
Consolidation, Eliminations [Member] | Obligations [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	0	0
Consolidation, Eliminations [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	0	0
Consolidation, Eliminations [Member] | Unsecured Debt [Member]
Cash flows provided by (used in) financing activities:
Proceeds from senior notes, net	0
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(2,800,000)	(1,300,000)	(900,000)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net	0	0	(31,200,000)
Proceeds from disposal of business, net of cash divested	0	0
Capital expenditures	0	0	0
Proceeds from sale of property and equipment	0	0	0
(Payments for) proceeds from other investments, net	0	(200,000)	(200,000)
Net cash used in investing activities	0	(200,000)	(31,400,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	0	0	0
(Repayments of) proceeds from other borrowings and capital lease obligations	0	0	0
Repurchase of common stock		(75,000,000)	(75,000,000)
Net financing activities and advances (to) from consolidated affiliates	(5,500,000)	71,500,000	94,900,000
Net cash provided by (used in) financing activities	2,800,000	1,500,000	32,300,000
Net (decrease) increase in cash and cash equivalents	0	0	0
Net effect of currency translation on cash	0	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	0	0	0
Cash and cash equivalents of discontinued operations	0	0	0
Cash and cash equivalents of continuing operations	0	0	0
Parent Company [Member] | Obligations [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	0	0
Parent Company [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	8,300,000	5,000,000	12,400,000
Parent Company [Member] | Unsecured Debt [Member]
Cash flows provided by (used in) financing activities:
Proceeds from senior notes, net	0
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	180,700,000	141,400,000	33,600,000
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net	(45,000,000)	(118,100,000)	0
Proceeds from disposal of business, net of cash divested	(3,000,000)	0
Capital expenditures	(115,600,000)	(76,200,000)	(70,900,000)
Proceeds from sale of property and equipment	15,900,000	7,400,000	6,100,000
(Payments for) proceeds from other investments, net	(1,200,000)	0	4,600,000
Net cash used in investing activities	(148,900,000)	(186,900,000)	(60,200,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	(80,700,000)	74,000,000	60,000,000
(Repayments of) proceeds from other borrowings and capital lease obligations	(69,100,000)	(42,500,000)	(30,300,000)
Repurchase of common stock		0	0
Net financing activities and advances (to) from consolidated affiliates	(109,800,000)	54,400,000	(112,300,000)
Net cash provided by (used in) financing activities	(35,600,000)	52,600,000	(126,100,000)
Net (decrease) increase in cash and cash equivalents	(3,800,000)	7,100,000	(152,700,000)
Net effect of currency translation on cash	0	0	0
Cash and cash equivalents - beginning of period	12,700,000	5,600,000	158,300,000
Cash and cash equivalents - end of period	8,900,000	12,700,000	5,600,000
Cash and cash equivalents of discontinued operations	0	0	0
Cash and cash equivalents of continuing operations	8,900,000	12,700,000	5,600,000
Guarantor Subsidiaries [Member] | Obligations [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	(30,400,000)	(34,100,000)	(51,300,000)
Guarantor Subsidiaries [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	4,400,000	800,000	7,800,000
Guarantor Subsidiaries [Member] | Unsecured Debt [Member]
Cash flows provided by (used in) financing activities:
Proceeds from senior notes, net	250,000,000
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	22,500,000	32,400,000	(12,000,000)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net	(103,600,000)	(1,400,000)	(9,500,000)
Proceeds from disposal of business, net of cash divested	0	97,700,000
Capital expenditures	(10,700,000)	(3,500,000)	(800,000)
Proceeds from sale of property and equipment	0	0	100,000
(Payments for) proceeds from other investments, net	0	0	0
Net cash used in investing activities	(114,300,000)	92,800,000	(10,200,000)
Cash flows provided by (used in) financing activities:
Proceeds from (repayments of) credit facility	(20,000,000)	0	0
(Repayments of) proceeds from other borrowings and capital lease obligations	(1,600,000)	0	0
Repurchase of common stock		0	0
Net financing activities and advances (to) from consolidated affiliates	115,300,000	(125,900,000)	17,400,000
Net cash provided by (used in) financing activities	91,700,000	(125,900,000)	17,400,000
Net (decrease) increase in cash and cash equivalents	0	(700,000)	(4,800,000)
Net effect of currency translation on cash	0	100,000	200,000
Cash and cash equivalents - beginning of period	14,100,000	14,700,000	19,300,000
Cash and cash equivalents - end of period	14,100,000	14,100,000	14,700,000
Cash and cash equivalents of discontinued operations	0	400,000	12,900,000
Cash and cash equivalents of continuing operations	14,100,000	13,700,000	1,800,000
Non-Guarantor Subsidiaries [Member] | Obligations [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	(2,000,000)	0	0
Non-Guarantor Subsidiaries [Member] | Stock Compensation Plan [Member]
Cash flows provided by (used in) financing activities:
Proceeds from (payments for) other financing activities	0	0	0
Non-Guarantor Subsidiaries [Member] | Unsecured Debt [Member]
Cash flows provided by (used in) financing activities:
Proceeds from senior notes, net	$ 0