Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Schedule of Amounts Recorded in Prepaid Expenses and Other (Details)

v3.3.1.900
Significant Accounting Policies - Schedule of Amounts Recorded in Prepaid Expenses and Other (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Prepaid Expense And Other Assets Current [Abstract]    
Derivative assets - current [1] $ 10,036 $ 7,417
Prepaid insurance and surety bonds 7,475 13,130
Prepaid deposits related to royalties 5,943 9,681
Other [2] 3,425 6,119
Prepaid expenses and other $ 26,879 $ 36,347
[1] (1) Includes open and closed (and not yet collected) derivative commodity contracts recorded at fair value.
[2] (1) Individual items were less than 5% of total current assets for either period presented.