Property and equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property Plant And Equipment [Abstract]

Property and Equipment

	2013		2012
Land	$	14,549	$	15,449
Buildings		35,606		37,570
Leasehold interests and improvements		240		284
Vehicles		26,693		27,135
Machinery and equipment		3,581		7,838
		80,669		88,276
Less accumulated depreciation		28,148		34,911
	$	52,521	$	53,365