Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 93,585	$ 205,045
Short-term investments—available for sale securities	0	12,557
Accounts receivable, net	38,164	36,100
Accounts receivable, due from related parties	5,583	3,539
Inventories, net	92,988	110,075
Deferred tax assets	10,397	4,114
Prepaid expenses and other current assets	5,123	3,917
Total current assets	245,840	375,347
Property, plant and equipment, net	157,328	155,893
Railcars on operating lease, net	296,744	220,282
Deferred debt issuance costs	2,124	2,374
Goodwill	7,169	7,169
Investments in and loans to joint ventures	41,534	44,536
Other assets	7,934	4,157
Total assets	758,673	809,758
Current liabilities:
Accounts payable	42,760	64,971
Accounts payable, due to related parties	524	2,831
Accrued taxes	5,212	2,693
Accrued expenses	6,655	5,739
Accrued compensation	13,910	17,940
Accrued interest expense	286	4,465
Short-term debt, including current portion of long-term debt	6,618	2,755
Total current liabilities	75,965	101,394
Long-term debt, net of current portion	191,458	272,245
Deferred tax liability	78,485	53,466
Pension and post-retirement liabilities	9,104	9,518
Other liabilities	5,093	3,670
Total liabilities	360,105	440,293
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value, 50,000,000 shares authorized, 21,352,297 shares issued and outstanding as of both June 30, 2013 and December 31, 2012	213	213
Additional paid-in capital	239,609	239,609
Retained earnings	160,910	130,030
Accumulated other comprehensive loss	(2,164)	(387)
Total stockholders’ equity	398,568	369,465
Total liabilities and stockholders’ equity	$ 758,673	$ 809,758