Note 10 - Long-term Obligations (Details Textual)
$ in Thousands |
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12 Months Ended |
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Oct. 23, 2014
USD ($)
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Aug. 02, 2013
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Oct. 20, 2016
USD ($)
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May 28, 2014
USD ($)
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May 27, 2014
USD ($)
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| Debt Issuance Costs, Net |
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$ 1,070
|
$ 3,774
|
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| Write off of Deferred Debt Issuance Cost |
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2,302
|
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| Line of Credit, Available Borrowing Capicity, Collateralized Letters of Credit |
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$ 25,000
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| Number of Collateralized Letters of Credit |
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6
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| Letters of Credit Outstanding, Amount |
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$ 5,414
|
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|
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| Line of Credit Facility, Remaining Borrowing Capacity |
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194,586
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| Debt Agreement, Maximum Borrowing Capacity |
|
$ 225,000
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| Line of Credit Facility, Current Borrowing Capacity |
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$ 0
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| NET Services [Member] |
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| Number of Capital Leases |
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4
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| Capital Leased Assets, Gross |
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$ 4,571
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| Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation |
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$ 460
|
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| Senior Credit Facility [Member] |
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| Debt Instrument, Percentage of Pledge of Stock |
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100.00%
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| Percentage of Capital Stock of Direct Foreign Subsidiary Secured by Pledges |
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65.00%
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| Line of Credit Facility, Additional Maximum Borrowing Capacity |
|
$ 75,000
|
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| Prepayment of Debt, Percentage of Outstanding Principal Amount |
|
100.00%
|
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| Revolving Credit Facility [Member] |
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| Line of Credit Facility, Maximum Borrowing Capacity |
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$ 165,000
|
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$ 240,000
|
$ 165,000
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| Proceeds from Lines of Credit |
|
16,000
|
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| Swingline Loans [Member] |
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| Line of Credit Facility Sublimit Capacity |
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10,000
|
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| Letter of Credit [Member] |
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| Line of Credit Facility, Maximum Borrowing Capacity |
|
25,000
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| Letter of Credit [Member] | Minimum [Member] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
2.25%
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| Letter of Credit [Member] | Maximum [Member] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
3.25%
|
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| Discontinued Operations, Net of Tax [Member] |
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| Write off of Deferred Debt Issuance Cost |
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$ 2,302
|
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| Credit Facility, Fourth Amendment, Term Loan Tranche [Member] |
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| Line of Credit Facility, Maximum Borrowing Capacity |
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$ 200,000
|
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| Debt Instrument, Covenant, Maximum Leverage Ratio |
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3
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| Debt Instrument, Covenant, Minimum Interest Coverage Ratio |
|
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3
|
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| Term Loan [Member] |
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| Long-term Debt |
|
$ 60,000
|
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] |
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| Long-term Debt |
$ 250,000
|
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Minimum [Member] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
0.25%
|
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] |
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| Debt Instrument, Basis Spread on Variable Rate |
2.25%
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Minimum [Member] | Base Rate [Member] |
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| Debt Instrument, Basis Spread on Variable Rate |
1.25%
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Maximum [Member] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
0.50%
|
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] |
|
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| Debt Instrument, Basis Spread on Variable Rate |
3.25%
|
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| Credit Facility, Second Amendment, Term Loan Tranche [Member] | Maximum [Member] | Base Rate [Member] |
|
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| Debt Instrument, Basis Spread on Variable Rate |
2.25%
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| Capital Lease Obligations [Member] | NET Services [Member] |
|
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| Debt Instrument, Interest Rate, Effective Percentage |
|
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3.28%
|
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| Capital Lease Obligations [Member] | Minimum [Member] | NET Services [Member] |
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| Debt Instrument, Term |
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1 year 270 days
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| Capital Lease Obligations [Member] | Maximum [Member] | NET Services [Member] |
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| Debt Instrument, Term |
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3 years
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