Accrued Expenses and Other Liabilities Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued stock based compensation	$ 7,859	$ 6,980
Accrued compensation	5,465	6,289
Accrued severance	1,428	697
Accrued and withheld taxes, other than income taxes	1,149	1,199
Financing lease obligation	996	876
Reserve for unrecognized tax benefits	760	738
Accrued health benefits	676	700
Accrued profit sharing	627	774
Other	8,329	7,795
Accrued Liabilities, Current	$ 27,289	$ 26,048