Debt Components of Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Long-term Debt [Roll Forward]
Repayment of debt and revolving credit facility	$ (22,500)	$ 0
Amortization of deferred issuance cost	795	$ 0
Long term debt, current portion, net of deferred issuance cost	8,410		$ 0
Long term debt, net of deferred issuance cost	216,936		$ 0
Wells Fargo Bank, National Association
Long-term Debt [Roll Forward]
Long-term Line of Credit	0
Deferred issuance cost, net	0
Long-term Debt	0
Proceeds from lines of credit	255,000
Deferred issuance cost, gross	(7,949)
Line of Credit Facility, Increase, Borrowings Net Of Financing Costs	247,051
Repayment of debt and revolving credit facility	(22,500)
Amortization of deferred issuance cost	795
Debt Instrument, Decrease, Repayments Net of Amortization	(21,705)
Long-term Line of Credit	232,500
Deferred issuance cost, net	(7,154)
Long-term Debt	225,346
Long term debt, current portion, net of deferred issuance cost	8,410
Long term debt, net of deferred issuance cost	216,936
Wells Fargo Bank, National Association | Term Loan Facility
Long-term Debt [Roll Forward]
Long-term Line of Credit	0
Proceeds from lines of credit	200,000
Repayment of debt and revolving credit facility	(2,500)
Long-term Line of Credit	197,500
Wells Fargo Bank, National Association | Revolving Credit Facility
Long-term Debt [Roll Forward]
Long-term Line of Credit	0
Proceeds from lines of credit	55,000
Repayment of debt and revolving credit facility	(20,000)
Long-term Line of Credit	$ 35,000