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Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Accounts receivable - allowance for doubtful accounts [Member]
Dec. 31, 2012
Accounts receivable - allowance for doubtful accounts [Member]
Dec. 31, 2011
Accounts receivable - allowance for doubtful accounts [Member]
Dec. 31, 2013
Inventory-reserve for slow-moving items [Member]
Dec. 31, 2012
Inventory-reserve for slow-moving items [Member]
Dec. 31, 2011
Inventory-reserve for slow-moving items [Member]
Dec. 31, 2013
Notes receivable - allowance for doubtful accounts [Member]
Dec. 31, 2012
Notes receivable - allowance for doubtful accounts [Member]
Dec. 31, 2011
Notes receivable - allowance for doubtful accounts [Member]
Dec. 31, 2010
Notes receivable - allowance for doubtful accounts [Member]
Dec. 31, 2013
Deferred tax assets - valuation allowance [Member]
Dec. 31, 2012
Deferred tax assets - valuation allowance [Member]
Dec. 31, 2011
Deferred tax assets - valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]                          
Balance at Beginning of Year $ 636 $ 955 $ 636 $ 1,818 $ 1,767 $ 1,616 $ 970 $ 970 $ 970 $ 970 $ 273 $ 344 $ 310
Additions- Charges to (Recovery of) Costs and Expenses 478 (214) 347 249 181 751         25   34
Deductions- Write- offs/Costs Incurred 287 105 28 678 130 600           71  
Balance at End of Year $ 827 $ 636 $ 955 $ 1,389 $ 1,818 $ 1,767 $ 970 $ 970 $ 970 $ 970 $ 298 $ 273 $ 344