CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net earnings	$ 256,299	$ 212,619	$ 185,492
Adjustments to reconcile net earnings to net cash provided by operations:
Depreciation and amortization	164,437	145,147	126,029
Provision (credit) for doubtful accounts	1,260	(42)	266
Provision for deferred income taxes	103,056	77,005	70,004
Loss (gain) on disposition of assets	(888)	14	40
Equity in earnings of affiliates, net of distributions and contributions	(348)	1,874	(347)
Amortization of unearned share-based compensation	11,621	9,796	9,228
Other	9,029	3,924	901
Increase (decrease) in cash flows resulting from changes in:
Accounts receivable	2,235	(8,744)	(58,351)
Inventory	43,275	(46,372)	(26,355)
Other assets	(47,526)	(5,180)	(7,247)
Income taxes payable	313	(4,347)	3,026
Accounts payable	23,088	(10,484)	21,492
Accrued and other liabilities	35,181	(49,480)	(12,183)
Net cash provided by operating activities	601,032	325,730	311,995
Cash flows from investing activities:
Capital expenditures	(253,227)	(312,167)	(226,238)
Acquisitions of businesses and marine equipment, net of cash acquired	(3,643)	(380,925)	(859,512)
Proceeds from disposition of assets	33,982	19,651	11,821
Retirement of interest rate swaps assumed in acquisition	0	0	(14,803)
Net cash used in investing activities	(222,888)	(673,441)	(1,088,732)
Cash flows from financing activities:
Borrowings (payments) on bank credit facilities, net	(150,960)	97,110	95,000
Borrowings on long-term debt	225,000	275,000	531,646
Payments on long-term debt, net	(460,000)	(39,005)	(33,128)
Return of investment to noncontrolling interests	(3,857)	(2,728)	(2,115)
Proceeds from noncontrolling interest investments	0	0	268
Proceeds from exercise of stock options	6,635	8,932	4,367
Payment of contingent liability	(5,000)	0	0
Excess tax benefit from equity compensation plans	3,001	3,212	1,348
Net cash provided by (used in) financing activities	(385,181)	342,521	597,386
Decrease in cash and cash equivalents	(7,037)	(5,190)	(179,351)
Cash and cash equivalents, beginning of year	11,059	16,249	195,600
Cash and cash equivalents, end of year	4,022	11,059	16,249
Cash paid during the year:
Interest	21,393	21,364	16,455
Income taxes	46,136	52,105	34,926
Noncash investing activity:
Stock issued in acquisitions	0	29,080	113,019
Cash acquired in acquisitions	0	2,301	4,044
Disposition of assets for receivables	$ 0	$ 0	$ 682