Debt - 2015 Subordinated Debt - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Oct. 02, 2015	Mar. 31, 2015	Mar. 31, 2016
Line Of Credit Facility [Line Items]
Proceeds from long-term debt		$ 73,802
2.50% Subordinated Convertible Debt Maturing September 30, 2021
Line Of Credit Facility [Line Items]
Debt instrument, face amount	$ 25,000
Debt instrument, unused capacity	50,000
Proceeds from long-term debt	$ 25,000
Interest rate	2.50%
Maturity Date	Sep. 30, 2021
Conversion price per share	$ 30.00
Long term debt			$ 25,000
Debt instrument, interest rate			2.50%
12.0% Unsecured Subordinated Convertible Debt Maturing October 02, 2020
Line Of Credit Facility [Line Items]
Debt instrument, face amount	$ 25,000
Interest rate	12.00%
Maturity Date	Oct. 02, 2020
Debt repayment period under certain conditions before maturity date	Oct. 02, 2017
2015 Subordinated Debt Issuance [Member]
Line Of Credit Facility [Line Items]
Deferred debt issuance costs	$ 800