Partnership's Consolidated Balance Sheet included Assets and Liabilities of Funds (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets:
Total current assets	$ 16,587	$ 7,254
Timber, timberland and roads (net of $25,446 and $20,664 of accumulated depletion in 2013 and 2012)	252,895	259,681
Other long-term assets	255	276
Total assets	269,958	267,499
Liabilities and equity:
Current liabilities excluding long-term debt	781	993
Current portion of long-term debt	123	125
Total current liabilities	7,975	7,722
Long-term debt	43,655	43,710
Total liabilities and equity	269,958	267,499
ORM Timber Funds
Assets:
Cash	745	1,262
Other current assets	982	691
Total current assets	1,727	1,953
Timber, timberland and roads (net of $25,446 and $20,664 of accumulated depletion in 2013 and 2012)	171,120	175,410
Other long-term assets	104	111
Total assets	172,951	177,474
Liabilities and equity:
Current liabilities excluding long-term debt	1,602	1,413
Current portion of long-term debt	19	34
Total current liabilities	1,621	1,447
Long-term debt	11,000	11,002
Total liabilities	12,621	12,449
Funds' equity	160,330	165,025
Total liabilities and equity	$ 172,951	$ 177,474