Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accrued Expenses
Salaries and benefits	$ 12,939	$ 16,582
Professional fees	858us-gaap_AccruedProfessionalFeesCurrent	574us-gaap_AccruedProfessionalFeesCurrent
Accrued interest	839us-gaap_InterestPayableCurrent	850us-gaap_InterestPayableCurrent
Other	4,099us-gaap_OtherAccruedLiabilitiesCurrent	4,606us-gaap_OtherAccruedLiabilitiesCurrent
Total accrued expense	$ 18,735us-gaap_AccruedLiabilitiesCurrent	$ 22,612us-gaap_AccruedLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details