Accrued Expenses and Other Liabilities - (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of accrued expenses and other liabilities
Accrued property taxes	$ 1,056	$ 1,412
Accrued employee compensation	8,776	10,639
Accrued interest	578	683
Deferred grant revenue	0	745
Contingent consideration, current portion	14,762	9,228
Unfavorable lease obligation, current portion	1,828	1,828
Other	1,466	3,951
Total	$ 28,466	$ 28,486