Quarterly report pursuant to Section 13 or 15(d)

Income Taxes Income Taxes - Unrecognized tax benefits (Details)

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Income Taxes Income Taxes - Unrecognized tax benefits (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2015
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Balance, beginning of period $ 3,700
Additions for prior year tax positions 0
Settlements with tax authorities 0
Reductions of prior year tax positions 0
Balance, end of period $ 3,700