Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts:
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 4,246	$ 4,338	$ 1,885
Acquired Balances	0	0	0
Charged to Expense	1,265	1,710	3,785
Deductions	(1,750)	(1,802)	(1,332)
Balance End of Year	3,761	4,246	4,338
Deferred income tax asset valuation allowance:
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	1,274	1,213	1,334
Additions	(222)	75	168
Charged to Expense	(313)	158
Deductions	0	(14)	(289)
Balance End of Year	$ 1,052	$ 1,274	$ 1,213