Annual report pursuant to Section 13 and 15(d)

Inventories Textuals (Details)

v3.6.0.2
Inventories Textuals (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
LIFO Inventory Liquidation Effect on Income - Increase (Decrease) Income $ 0 $ (11,371)
Excess of Replacement or Current Costs over Stated LIFO Value 4,390  
Inventory Valuation Reserves   836
Excess of Replacement or Current Costs over Stated LIFO Value, Net of the Fair Value Hedged Item $ 13,154 $ 18,521