Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Net earnings	$ 41,556	$ 25,365
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	13,395	11,286
Amortization of deferred costs	313	349
Loss (Gain) on disposal of property, plant and equipment	47	(51)
Share-based compensation	3,075	2,813
Change in interest receivable, due from related parties	0	292
(Earnings) loss from joint ventures	1,777	(880)
Provision for deferred income taxes	19,297	15,948
Adjustment to provision for losses on accounts receivable	(6)	279
Items related to investing activities:
Realized gain on sale of short-term investments - available for sale securities	(2,008)	0
Items related to financing activities:
Loss on debt extinguishment	392	0
Changes in operating assets and liabilities:
Accounts receivable, net	(2,087)	13,355
Accounts receivable, due from related parties	(2,065)	(7,216)
Income taxes receivable	(64)	(966)
Inventories, net	17,034	(14,351)
Prepaid expenses and other current assets	(1,208)	(1,072)
Accounts payable	(22,200)	13,319
Accounts payable, due to affiliates	(2,307)	200
Accrued expenses and taxes	(8,612)	2,920
Other	(1,738)	(189)
Net cash provided by operating activities	54,591	61,401
Investing activities:
Purchases of property, plant and equipment	(10,927)	(5,343)
Capital expenditures - leased railcars	(80,877)	(113,513)
Proceeds from the sale of property, plant and equipment	2	148
Proceeds from the sale of short-term investments - available for sale securities	12,699	0
Proceeds from repayments of loans by joint ventures	1,300	164
Investments in and loans to joint ventures	(116)	(366)
Net cash used in investing activities	(77,919)	(118,910)
Financing activities:
Repayments of long-term debt	(176,765)	0
Proceeds from long-term debt	99,841	0
Payment of common stock dividends	(10,676)	0
Debt issuance costs	(413)	0
Net cash used in financing activities	(88,013)	0
Effect of exchange rate changes on cash and cash equivalents	(119)	(12)
Decrease in cash and cash equivalents	(111,460)	(57,521)
Cash and cash equivalents at beginning of period	205,045	307,172
Cash and cash equivalents at end of period	$ 93,585	$ 249,651