v2.4.0.8
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from operating activities:    
Net income (loss) $ 11,052 $ (5,689)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization expense 20,516 20,122
Deferred income tax expense 6,017 1,616
Stock-based compensation 774 1,215
Tax benefit from exercise of stock options (975) (511)
Loss on disposition of assets, net 407 441
Unrealized loss on derivative instrument 53 117
Loss from equity method investee 441   
Changes in assets and liabilities, net of effects of acquisitions:    
Increase in prepaid expenses and other current assets (377) (4,273)
Decrease (increase) in receivables (19,925) 15,295
Increase in inventories (49) (2,603)
Decrease (increase) in costs in excess of billings 242 (175)
Decrease in accounts payable, other accrued liabilities, and other liabilities (4,082) (10,943)
Increase in deferred revenue and billings in excess of costs 1,003 110
Net cash provided by operating activities 15,097 14,722
Cash flows from investing activities:    
Acquisition of equipment and leasehold improvements (35,436) (11,847)
Buy-out of previously leased aircraft (5,554) (22,672)
Proceeds from disposition and sale of equipment and assets held for sale 5,567 8,634
Decrease in other assets, net 535 993
Net cash used by investing activities (34,888) (24,892)
Cash flows from financing activities:    
Proceeds from issuance of common stock, net 479 528
Borrowings under line of credit 15,000 31,527
Payments under line of credit (2,000) (30,000)
Payments for financing costs (69) (113)
Proceeds from long-term debt 19,965 52,162
Payments of long-term debt and notes payable (7,755) (5,384)
Payments of capital lease obligations (8,661) (31,500)
Tax benefit from exercise of stock options 975 511
Proceeds from non-controlling interests 98   
Net cash provided by financing activities 18,032 17,731
Increase (decrease) in cash and cash equivalents (1,759) 7,561
Cash and cash equivalents at beginning of period 9,862 3,818
Cash and cash equivalents at end of period 8,103 11,379
Interest paid in cash during the period 5,355 4,489
Income taxes paid in cash during the period $ 51 $ 835