Consolidated Statements of Partners' Capital (USD $) In Thousands, unless otherwise specified	Total	General partner	Class A limited partners	Accumulated other comprehensive loss	Comprehensive income (loss)
Balance at Dec. 31, 2009	$ 43,526	$ 81	$ 43,560	$ (115)
Comprehensive income (loss)
Allocation of net income (loss)	(1,487)		(1,487)		(1,487)
Accumulated other comprehensive loss
Change in pension and severance obligations	28			28	28
Comprehensive income (loss)	(1,459)				(1,459)
Balance at Dec. 31, 2010	42,067	81	42,073	(87)
Comprehensive income (loss)
Allocation of net income (loss)	712		712		712
Accumulated other comprehensive loss
Change in pension and severance obligations	(242)			(242)	(242)
Comprehensive income (loss)	470				470
Balance at Dec. 31, 2011	42,537	81	42,785	(329)
Comprehensive income (loss)
Allocation of net income (loss)	(499)		(499)		(499)
Cash distributions paid and / or declared:
Cash distributions paid and / or declared:	0	0	0
Accumulated other comprehensive loss
Change in pension and severance obligations	(36)			(36)	(36)
Comprehensive income (loss)	(535)				(535)
Balance at Dec. 31, 2012	$ 42,002	$ 81	$ 42,286	$ (365)