Note 8 - Income Taxes (Detail) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Net operating losses	$ 14,965	$ 16,045
Accruals not currently deductible	11,676	13,185
Bad debts	1,168	750
Foreign tax credits	1,653	2,026
Other	4,988	4,331
Total deferred tax assets	34,450	36,337
Valuation allowance	(13,563)	(16,734)
Total deferred tax assets, net of allowances	20,887	19,603
Deferred tax liabilities:
Accelerated depreciation and amortization	43,063	47,320
Other	12,821	5,922
Total deferred tax liabilities	55,884	53,242
Total net deferred tax liability	(34,997)	(33,639)
Current portion of deferred tax assets	11,596	13,224
Non current portion of deferred tax assets	274	341
Current portion of deferred tax liabilities	(519)	(360)
Non current portion of deferred tax liabilities	(46,348)	(46,844)
Net deferred tax liabilities	$ (34,997)	$ (33,639)