Lease cost:

Amortization of right-of-use assets

$

3,326

$

4,048

$

6,134

Interest on lease obligations

370

547

767

Finance lease cost

3,696

4,595

6,901

Operating lease cost

4,504

5,603

8,222

Short-term lease cost

8,709

7,548

5,335

Total lease cost

$

16,909

$

17,746

$

20,458

Cash paid for amounts included in the measurement of lease obligations:

Operating cash flows from finance leases

$

370

$

547

$

767

Operating cash flows from operating leases

4,544

5,904

8,849

Financing cash flows from finance leases

3,813

4,815

7,956

$

8,727

$

11,266

$

17,572

Right-of-use assets obtained in exchange for new finance lease obligations

$

-

$

-

$

337

Right-of-use assets obtained in exchange for new operating lease obligations

$

12,487

$

2,980

$

5,409

Right-of-use assets derecognized upon early termination of finance leases

$

2,191

$

20

$

598

Right-of-use assets derecognized upon early termination of operating leases

$

249

$

7,572

$

1,688

Weighted-average lease term (years):

Finance leases

2.7

3.8

4.4

Operating leases

5.2

4.2

4.3

Weighted-average discount rate (percentage):

Finance leases

3.9

%

4.1

%

4.0

%

Operating leases

5.5

%

5.0

%

4.7

%