Long-Term Obligations (Details 3) $ in Thousands	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
2015	$ 7,500
2016	30,000
2017	37,500
2018	52,500
2019	697,000
Senior Notes [Member]
Debt Instrument [Line Items]
2015	7,500
2016	30,000
2017	37,500
2018	52,500
2019	465,000
Revolving loans [Member]
Debt Instrument [Line Items]
2015	0
2016	0
2017	0
2018	0
2019	$ 232,000