Consolidated Statements of Partners' Capital (USD $) In Thousands, unless otherwise specified	Total	Accumulated other comprehensive income (loss)	General partner	Class A limited partners
Balance at Dec. 31, 2010	$ 42,067	$ (87)	$ 81	$ 42,073
Allocation of net income (loss):
Allocation of net income (loss):	712			712
Accumulated other comprehensive income (loss)
Change in pension and severance obligations	(242)	(242)
Balance at Dec. 31, 2011	42,537	(329)	81	42,785
Allocation of net income (loss):
Allocation of net income (loss):	(499)			(499)
Accumulated other comprehensive income (loss)
Change in pension and severance obligations	(36)	(36)
Balance at Dec. 31, 2012	42,002	(365)	81	42,286
Allocation of net income (loss):
Allocation of net income (loss):	(3,670)			(3,670)
Cash distributions paid and / or declared:
Cash distributions paid and / or declared:	(150)			(150)
Accumulated other comprehensive income (loss)
Change in pension and severance obligations	402	402
Balance at Dec. 31, 2013	$ 38,584	$ 37	$ 81	$ 38,466