Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of effective tax rates (Details)

v3.6.0.2
Income Taxes - Reconciliation of effective tax rates (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Income before provision for income taxes $ 16,367 $ 292 $ 6,292
Federal statutory tax expense 5,728 102 2,202
State income taxes, net of Federal benefit 678 604 666
Net state impact of deferred rate change (110) 55 264
Non deductible expenses 670 933 764
Impact of reserve for uncertain tax positions (411) (1,772) (977)
Stock-based compensation expense 306 402 415
Energy efficiency preferences (4,130) (3,280) (9,517)
Foreign items and rate differential 516 1,556 719
Valuation allowance 213 4,255 1,408
Energy partnership basis adjustments 0 2,133 0
Miscellaneous 910 (12) (35)
Income tax (benefit) provision $ 4,370 $ 4,976 $ (4,091)
Effective tax rate:      
Federal statutory rate expense 35.00% 35.00% 35.00%
State income taxes, net of federal benefit 4.10% 206.80% 10.60%
Net state impact of deferred rate change (0.70%) 18.80% 4.20%
Non deductible expenses 4.10% 319.50% 12.10%
Impact of reserve for uncertain tax positions (2.50%) (606.80%) (15.50%)
Stock-based compensation expense 1.90% 137.70% 6.60%
Energy efficiency preferences (25.20%) (1123.30%) (151.30%)
Foreign items and rate differential 3.20% 532.90% 11.40%
Valuation allowance 1.30% 1457.20% 22.40%
Energy partnership basis adjustments 0.00% 730.50% 0.00%
Miscellaneous 5.50% (4.10%) (0.60%)
Effective tax rate 26.70% 1704.20% (65.10%)