CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net earnings	$ 212,619	$ 185,492	$ 117,382
Adjustments to reconcile net earnings to net cash provided by operations:
Depreciation and amortization	145,147	126,029	95,296
Provision (credit) for doubtful accounts	(42)	266	(15)
Provision for deferred income taxes	77,005	70,004	34,439
Loss on disposition of assets	14	40	78
Equity in earnings of affiliates, net of distributions and contributions	1,874	(347)	(283)
Amortization of unearned share-based compensation	9,796	9,228	10,867
Other	3,924	901	0
Increase (decrease) in cash flows resulting from changes in:
Accounts receivable	(8,744)	(58,351)	(17,563)
Inventory	(46,372)	(26,355)	973
Other assets	(5,180)	(7,247)	(2,511)
Income taxes payable	(4,347)	3,026	(13,284)
Accounts payable	(10,484)	21,492	19,262
Accrued and other liabilities	(49,480)	(12,183)	605
Net cash provided by operating activities	325,730	311,995	245,246
Cash flows from investing activities:
Capital expenditures	(312,167)	(226,238)	(136,841)
Acquisitions of businesses and marine equipment, net of cash acquired	(380,925)	(859,512)	0
Proceeds from disposition of assets	19,651	11,821	9,725
Retirement of interest rate swaps assumed in acquisition	0	(14,803)	0
Net cash used in investing activities	(673,441)	(1,088,732)	(127,116)
Cash flows from financing activities:
Borrowings on long-term debt	275,000	531,646	0
Borrowings on bank credit facilities, net	97,110	95,000	0
Payments on long-term debt, net	(39,005)	(33,128)	(105)
Return of investment to noncontrolling interests	(2,728)	(2,115)	(1,794)
Proceeds from noncontrolling interest investments	0	268	69
Proceeds from exercise of stock options	8,932	4,367	4,884
Purchase of treasury stock	0	0	(23,793)
Excess tax benefit from equity compensation plans	3,212	1,348	373
Net cash provided by (used in) financing activities	342,521	597,386	(20,366)
Increase (decrease) in cash and cash equivalents	(5,190)	(179,351)	97,764
Cash and cash equivalents, beginning of year	16,249	195,600	97,836
Cash and cash equivalents, end of year	11,059	16,249	195,600
Cash paid during the year:
Interest	21,364	16,455	10,604
Income taxes	52,105	34,926	50,743
Noncash investing activity:
Stock issued in acquisitions	29,080	113,019	0
Cash acquired in acquisitions	2,301	4,044	0
Disposition of assets for receivables	$ 0	$ 682	$ 1,569