Adjusted EBITDA (in thousands, unaudited) | ||||||||||||||||
Three Months Ended | Twelve Months Ended | |||||||||||||||
March 31, | March 31, | |||||||||||||||
2016 | 2015 | 2016 | 2015 | |||||||||||||
Net income | $ | 6,197 | $ | 7,796 | $ | 14,741 | $ | 23,740 | ||||||||
Add: | ||||||||||||||||
Income tax expense | 693 | 1,139 | 8,748 | 6,690 | ||||||||||||
Interest expense | 611 | 273 | 1,641 | 1,397 | ||||||||||||
Depreciation and amortization | 3,503 | 4,080 | 13,981 | 17,311 | ||||||||||||
Stock compensation expense | 814 | 740 | 3,343 | 2,867 | ||||||||||||
Adjusted EBITDA | $ | 11,818 | $ | 14,028 | $ | 42,454 | $ | 52,005 | ||||||||