Supplemental Condensed Consolidating Statements of Cash flows (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements Captions [Line Items]
Net cash (used in) provided by operating activities	$ 464,227	$ 271,275
Cash Flows from Investing Activities:
Property and equipment additions, net of disposals	(127,214)	(89,276)
Acquisition of property and businesses	(19,543)	(34,500)
Net cash used in investing activities	(146,757)	(123,776)
Cash Flows from Financing Activities:
Reduction of long-term debt	(166,671)	(158,871)
Additional borrowings	14,400	20,800
Financing costs	(44)	0
Repurchase of common shares	(171,042)	(28,767)
Dividends paid	(9,757)	(9,899)
Issuance of common stock	2,331	1,768
Excess income tax benefits related to stock-based compensation	11,002	20,807
Profit distributions to noncontrolling interests	(3,407)	(2,413)
Proceeds received from sale/leaseback of real property	0	12,551
Changes in intercompany balances with affiliates, net	0	0
Net cash used in financing activities	(323,188)	(144,024)
Effect of exchange rate changes on cash and cash equivalents	(920)	(466)
(Decrease) increase in cash and cash equivalents	(6,638)	3,009
Cash and cash equivalents, beginning of period	61,228	32,069
Cash and cash equivalents, end of period	54,590	35,078
Parent
Condensed Financial Statements Captions [Line Items]
Net cash (used in) provided by operating activities	52,278	62,343
Cash Flows from Investing Activities:
Property and equipment additions, net of disposals	0	0
Acquisition of property and businesses	0	0
Net cash used in investing activities	0	0
Cash Flows from Financing Activities:
Reduction of long-term debt	(166,096)	(156,097)
Additional borrowings	14,400	20,800
Financing costs	(44)
Repurchase of common shares	(171,042)	(28,767)
Dividends paid	(9,757)	(9,899)
Issuance of common stock	2,331	1,768
Excess income tax benefits related to stock-based compensation	11,002	20,807
Profit distributions to noncontrolling interests	0	0
Proceeds received from sale/leaseback of real property		0
Changes in intercompany balances with affiliates, net	266,928	89,045
Net cash used in financing activities	(52,278)	(62,343)
Effect of exchange rate changes on cash and cash equivalents	0	0
(Decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Guarantors
Condensed Financial Statements Captions [Line Items]
Net cash (used in) provided by operating activities	279,625	124,046
Cash Flows from Investing Activities:
Property and equipment additions, net of disposals	(61,718)	(59,217)
Acquisition of property and businesses	(10,506)	(22,513)
Net cash used in investing activities	(72,224)	(81,730)
Cash Flows from Financing Activities:
Reduction of long-term debt	(304)	(2,561)
Additional borrowings	0	0
Financing costs	0
Repurchase of common shares	0	0
Dividends paid	0	0
Issuance of common stock	0	0
Excess income tax benefits related to stock-based compensation	0	0
Profit distributions to noncontrolling interests	0	0
Proceeds received from sale/leaseback of real property		0
Changes in intercompany balances with affiliates, net	(212,988)	(45,555)
Net cash used in financing activities	(213,292)	(48,116)
Effect of exchange rate changes on cash and cash equivalents	(920)	(466)
(Decrease) increase in cash and cash equivalents	(6,811)	(6,266)
Cash and cash equivalents, beginning of period	47,192	21,784
Cash and cash equivalents, end of period	40,381	15,518
Non Guarantors
Condensed Financial Statements Captions [Line Items]
Net cash (used in) provided by operating activities	132,324	84,886
Cash Flows from Investing Activities:
Property and equipment additions, net of disposals	(65,496)	(30,059)
Acquisition of property and businesses	(9,037)	(11,987)
Net cash used in investing activities	(74,533)	(42,046)
Cash Flows from Financing Activities:
Reduction of long-term debt	(271)	(213)
Additional borrowings	0	0
Financing costs	0
Repurchase of common shares	0	0
Dividends paid	0	0
Issuance of common stock	0	0
Excess income tax benefits related to stock-based compensation	0	0
Profit distributions to noncontrolling interests	(3,407)	(2,413)
Proceeds received from sale/leaseback of real property		12,551
Changes in intercompany balances with affiliates, net	(53,940)	(43,490)
Net cash used in financing activities	(57,618)	(33,565)
Effect of exchange rate changes on cash and cash equivalents	0	0
(Decrease) increase in cash and cash equivalents	173	9,275
Cash and cash equivalents, beginning of period	14,036	10,285
Cash and cash equivalents, end of period	14,209	19,560
Consolidating Adjustments
Condensed Financial Statements Captions [Line Items]
Net cash (used in) provided by operating activities	0	0
Cash Flows from Investing Activities:
Property and equipment additions, net of disposals	0	0
Acquisition of property and businesses	0	0
Net cash used in investing activities	0	0
Cash Flows from Financing Activities:
Reduction of long-term debt	0	0
Additional borrowings	0	0
Financing costs	0
Repurchase of common shares	0	0
Dividends paid	0	0
Issuance of common stock	0	0
Excess income tax benefits related to stock-based compensation	0	0
Profit distributions to noncontrolling interests	0	0
Changes in intercompany balances with affiliates, net	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
(Decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ 0