Inteliquent (IQNT) 10-K 26 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	IQNT
Entity Registrant Name	INTELIQUENT, INC.
Entity Central Index Key	1292653
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		33,484,765
Entity Public Float			$438,157,905

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$104,737	$77,004
Receivables — net of allowance of $2,336 and $900, respectively	32,766	22,200
Deferred income taxes-current	836	720
Prepaid expenses	2,198	2,375
Other current assets	1,320	1,977
Total current assets	141,857	104,276
Property and equipment—net	23,678	25,815
Restricted cash	345	125
Deferred income taxes-noncurrent	3,284	5,495
Other assets	1,007	1,534
Total assets	170,171	137,245
Current liabilities:
Accounts payable	1,607	2,176
Accrued liabilities:
Taxes payable	1,263	2,437
Circuit cost	7,266	8,987
Rent	2,015	2,071
Payroll and related items	3,079	3,079
Other	897	1,674
Total current liabilities	16,127	20,424
Commitments and contingencies (Note 9)
Shareholders’ equity:
Preferred stock—par value of $.001; 50,000 authorized shares; no shares issued and outstanding at December 31, 2014 and December 31, 2013
Common stock—par value of $.001; 150,000 authorized shares; 33,458 shares and 32,215 shares issued and outstanding at December 31, 2014 and December 31, 2013, respectively	33	32
Less treasury stock, at cost; 3,351 shares at December 31, 2014 and December 31, 2013	-51,668	-51,668
Additional paid-in capital	217,628	203,989
Accumulated deficit	-11,949	-35,532
Total shareholders’ equity	154,044	116,821
Total liabilities and shareholders' equity	$170,171	$137,245

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]
Receivables, allowance	$2,336	$900
Preferred stock, par value	$0.00	$0.00
Preferred stock, authorized shares	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, authorized shares	150,000,000	150,000,000
Common stock, shares issued	33,458,000	33,458,000
Common stock, shares outstanding	32,215,000	32,215,000
Treasury stock, shares, at cost	3,351,000	3,351,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$220,508	$211,661	$233,003
Operating expense:
Network and facilities expense (excluding depreciation and amortization)	94,995	94,867	98,758
Operations	29,296	28,595	37,481
Sales and marketing	3,264	5,554	8,032
General and administrative	16,840	18,772	21,169
Depreciation and amortization	11,817	14,652	21,337
Carrier settlement	0	0	9,000
Impairment of property and equipment	0	0	7,845
Impairment of goodwill	0	0	44,543
Impairment of intangibles	0	0	17,318
(Gain) loss on sale of property and equipment	-60	192	-170
Loss (gain) on sale of Americas Data assets	1,081	-28,791
Total operating expense	157,233	133,841	265,313
Income (loss) from operations	63,275	77,820	-32,310
Other expense (income):
Interest expense (income)	51	-6	-21
Other (income) expense	-2	4	-1
Total other expense (income)	49	-2	-22
Income (loss) from continuing operations before provision for income taxes	63,226	77,822	-32,288
Provision for income taxes	24,703	13,524	1,958
Income (loss) from continuing operations	38,523	64,298	-34,246
Loss from discontinued operations, net of provision for income taxes		-3,808	-43,903
Loss on sale of discontinued operations, net of provision for income taxes		-4,837
Net income (loss)	$38,523	$55,653	($78,149)
Earnings (loss) per share - continuing operations:
Basic	$1.17	$1.99	($1.11)
Diluted	$1.15	$1.97	($1.11)
Loss per share - discontinued operations:
Basic		($0.27)	($1.43)
Diluted		($0.27)	($1.43)
Earnings (loss) per share - net income (loss):
Basic	$1.17	$1.72	($2.54)
Diluted	$1.15	$1.71	($2.54)
Weighted average number of shares outstanding:
Basic	32,887,000	32,306,000	30,798,000
Diluted	33,384,000	32,557,000	30,798,000

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$38,523	$55,653	($78,149)
Other comprehensive income (loss):
Foreign currency translation		4,904	-558
Total other comprehensive income (loss)		4,904	-558
Comprehensive income (loss)	$38,523	$60,557	($78,707)

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Shares Outstanding	Treasury Shares	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
In Thousands
Beginning Balance at Dec. 31, 2011	$259,678	$32	($50,103)	$185,014	$129,081	($4,346)
Beginning Balance (in shares) at Dec. 31, 2011		31,520
Net income (loss)	-78,149				-78,149
Dividend payment	-96,195				-96,195
Foreign currency translation	-558					-558
Tax benefit (deficiency) associated with share-based payments	1,066			1,066
Exercise of stock options (in shares)		508
Exercise of stock options	1,396			1,396
Stock option and non-vested share expense	13,171			13,171
Activity related to non-vested shares (in shares)		317
Activity related to non-vested shares	-1,316			-1,316
Ending Balance at Dec. 31, 2012	99,093	32	-50,103	199,331	-45,263	-4,904
Ending Balance (in shares) at Dec. 31, 2012		32,345
Net income (loss)	55,653				55,653
Dividend payment	-45,922				-45,922
Foreign currency translation	4,904					4,904
Tax benefit (deficiency) associated with share-based payments	-1,165			-1,165
Exercise of stock options (in shares)	206	206
Exercise of stock options	468			468
Stock option and non-vested share expense	6,163			6,163
Activity related to non-vested shares (in shares)		-68
Activity related to non-vested shares	-808			-808
Repurchase of common stock (in shares)		-268
Repurchase of common stock	-1,565		-1,565
Ending Balance at Dec. 31, 2013	116,821	32	-51,668	203,989	-35,532
Ending Balance (in shares) at Dec. 31, 2013	32,215	32,215
Net income (loss)	38,523				38,523
Dividend payment	-14,940				-14,940
Tax benefit (deficiency) associated with share-based payments	-1,992			-1,992
Exercise of stock options (in shares)	1,096	1,096
Exercise of stock options	12,476	1		12,475
Stock option and non-vested share expense	4,269			4,269
Activity related to non-vested shares (in shares)		147
Activity related to non-vested shares	-1,113			-1,113
Ending Balance at Dec. 31, 2014	$154,044	$33	($51,668)	$217,628	($11,949)
Ending Balance (in shares) at Dec. 31, 2014	32,215	33,458

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating
Net income (loss)	$38,523	$55,653	($78,149)
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	11,817	15,894	29,749
Deferred income taxes	8	-2,295	-8,592
Impairment of property and equipment			16,149
Impairment of goodwill and intangibles			75,340
(Gain) loss on sale of property and equipment	-60	458	732
Provision for uncollectible accounts	1,925	900	1,077
Loss (gain) on sale of Americas Data assets	1,081	-28,791
Loss on sale of discontinued operations		4,837
Non-cash share-based compensation	4,269	6,163	13,171
Gain (loss) on intercompany foreign exchange transactions		56	-328
Excess tax (benefit) associated with share-based payments	-1,090	-262	-1,066
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
Receivables	-12,491	4,281	3,668
Other current assets	-247	180	-3,635
Other noncurrent assets	2,614	199	1,247
Accounts payable	-175	-3,830	1,310
Accrued liabilities	-5,716	3,922	11,193
Noncurrent liabilities			-297
Net cash provided by operating activities	40,458	57,365	61,569
Investing
Purchase of property and equipment	-10,090	-12,470	-25,922
Proceeds from sale of property and equipment	72	28	206
Sale of other investments		534
Proceeds from sale of discontinued operations, net of transaction costs		42,587
Proceeds from sale of Americas Data assets, net of transaction costs		4,203
(Increase) decrease in restricted cash	-220	837
Net cash (used for) provided by investing activities	-10,238	35,719	-25,716
Financing
Proceeds from the exercise of stock options	12,476	468	1,396
Restricted shares withheld to cover employee taxes paid	-1,113	-808	-1,316
Dividends paid	-14,940	-45,922	-96,195
Payments made for repurchase of common stock		-1,565
Excess tax benefit associated with share-based payments	1,090	262	1,066
Net cash used for financing activities	-2,487	-47,565	-95,049
Effect of exchange rate changes on cash		6	396
Net increase (decrease) in cash and cash equivalents	27,733	45,525	-58,800
Cash and cash equivalents — Beginning	77,004	31,479	90,279
Cash and cash equivalents — End	104,737	77,004	31,479
Supplemental Disclosure of Cash Flow Information:
Cash paid for taxes	25,759	12,695	12,811
Supplemental Disclosure of Noncash Flow Items:
Investing activity — Accrued purchases of property and equipment	$1,348	$1,742	$3,415

DESCRIPTION_OF_THE_BUSINESS

DESCRIPTION OF THE BUSINESS	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
DESCRIPTION OF THE BUSINESS	1	DESCRIPTION OF THE BUSINESS
	Organization —Inteliquent, Inc. (the “Company”) provides voice telecommunications services primarily on a wholesale basis. The Company offers these services using an all-IP network, which enables the Company to deliver global connectivity for a variety of media, including voice and, historically, data and video. The Company’s solutions enable carriers and other providers to deliver voice traffic or other services where they do not have their own network or elect not to use their own network. These solutions are sometimes called “off-net” services. We also provide our solutions to customers, such as “over-the-top” providers, who also typically do not have their own network.
	On April 30, 2013, the Company sold its global data business to Global Telecom & Technology, Inc. (GTT) for $54.5 million, subject to certain adjustments. The total consideration consisted of $52.5 million in cash, subject to net working capital adjustments, and $2.0 million of non-cash commercial IP Transit and point-to-point Ethernet data network services to be provided to the Company by GTT free-of-charge for a three-year period. The $2.0 million of non-cash commercial services was calculated based upon the discounted present value of the market cost of such services as of the date on which the commercial services agreement was signed with GTT. In addition, the Company recorded in its 2013 consolidated statement of operations, as part of its gain amount on the sale of its global data business, approximately $2.4 million for divestiture-related costs, including legal and advisory services. Refer to Note 3 “Business Disposition” for a description of the sale of our global data business.

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	2	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Principles of Consolidation —The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
	Changes in Presentation —On April 30, 2013, the Company sold its global data business to GTT for $54.5 million, subject to certain adjustments. The Company determined that the appropriate level in which to assess discontinued operations was at its reporting unit level. As such, the Company’s Europe, Middle East and Africa (EMEA) and Asia Pacific (APAC) reporting units of the global data business consist of results of operations and cash flows that can be clearly distinguished from the rest of the entity and are therefore reflected in the consolidated statements of operations and in the consolidated balance sheets as discontinued operations. Historical information related to these reporting units have been reclassified accordingly. The Americas reporting unit of the global data business does not consist of results of operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of the entity. This reporting unit does not qualify for discontinued operations accounting treatment. Therefore, the Americas reporting unit of the global data business is reported in continuing operations in the consolidated statements of operations and in the consolidated balance sheets. Refer to Note 3 “Business Disposition” for more information regarding the sale of the global data business.
	Use of Estimates —The Company’s consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America. These accounting principles require management to make certain estimates and assumptions that can affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the periods presented. The Company believes that the estimates and assumptions upon which it relies are reasonable based upon information available to it at the time that these estimates and assumptions are made. To the extent there are material differences between these estimates and actual results, the Company’s consolidated financial statements will be affected.
	Cash and Cash Equivalents —The Company considers all highly liquid investments with an original maturity of 90 days or less to be cash equivalents. The carrying values of our cash and cash equivalents approximate fair value. At December 31, 2014, the Company had $32.9 million of cash in banks and $71.8 million in three money market funds. At December 31, 2013, the Company had $35.2 million of cash in banks and $41.8 million in three money market funds.
	Fair Value Measurements —Certain assets and liabilities are required to be recorded at fair value on a recurring basis. Fair value is determined based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. Assets measured at fair value on a nonrecurring basis include long-lived assets held and used. The fair value of cash and cash equivalents, accounts receivable and accounts payable approximate their carrying values. The three-tier value hierarchy, which prioritizes valuation methodologies based on the reliability of the inputs, is:
	Level 1—Valuations based on quoted prices for identical assets and liabilities in active markets.
	Level 2—Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.
	Level 3—Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably available assumptions made by other market participants.
	Accounts Receivable and Allowance for Doubtful Accounts—Accounts receivable consist of trade receivables recorded upon recognition of revenue from sales of voice services, reduced by reserves for estimated bad debts. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Credit is extended based on evaluation of the customer’s financial condition. We make judgments as to our ability to collect outstanding receivables and provide allowances for a portion of receivables when collection becomes doubtful. The specific identification method is applied to all significant outstanding invoices to determine this provision. At December 31, 2014 and December 31, 2013, our allowance for doubtful accounts was $2.3 million and $0.9 million, respectively.
	Property and Equipment — Property and equipment is recorded at cost. These values are depreciated over the estimated useful lives of the individual assets using the straight-line method. Any gains and losses from the disposition of property and equipment are included in operations as incurred. The estimated useful life for network equipment and tools and test equipment is five years. The estimated useful life for computer equipment, computer software and furniture and fixtures is three years. Leasehold improvements are amortized on a straight-line basis over an estimated useful life of five years or the life of the lease, whichever is less. As discussed in further detail below, the impairment of long-lived assets is evaluated when events or changes in circumstances indicate that a potential impairment has occurred.
	Long-lived Assets —The carrying value of long-lived assets, including property and equipment, are reviewed whenever events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Impairment of assets with definite lives is generally determined by comparing projected undiscounted cash flows to be generated by the asset, or appropriate grouping of assets, to its carrying value. If an impairment is identified, a loss is recorded equal to the excess of the asset’s net book value over its fair value. The fair value becomes the new cost basis of the asset. Determining the extent of an impairment, if any, typically requires various estimates and assumptions including using management’s judgment, cash flows directly attributable to the asset, the useful life of the asset and residual value, if any. In addition, the remaining useful life of the impaired asset is revised, if necessary. There were no property and equipment or intangible asset impairment charges in 2014 or 2013.
	The decline in our stock price and related market capitalization beginning late in the third quarter of 2012 and sustained through the date of filing of our Annual Report on Form 10-K for the year ended December 31, 2012 created an indication of potential impairment. We utilized Accounting Standards Codification 360, Property, Plant and Equipment (ASC 360), guidance to test the long-lived assets for realizability. During the year ended December 31, 2012, the Company recorded property and equipment and intangible assets impairment charges of $13.2 million and $25.8 million, respectively, as a result of the impairment test performed during fourth quarter of 2012. The Company recorded property and equipment impairment charges in each of its three reporting units, Americas, EMEA and APAC, in the amount of $4.9 million, $7.8 million and $0.5 million, respectively. The Company also recorded intangible assets impairment charges in each of our three reporting units, Americas, EMEA and APAC, in the amount of $17.3 million, $7.7 million and $0.8 million, respectively. In the 2012 consolidated statement of operations, the amounts related to EMEA and APAC are recorded as part of discontinued operations and the amount related to Americas is recorded as part of continuing operations. In addition, the Company ceased its hosted services offering during the year-ended December 31, 2012. As the equipment had no further use in the Company’s network the Company recorded an asset impairment charge of $2.9 million to write-off the related assets.
	Goodwill —Goodwill represents the excess of the purchase price of an acquired business over the fair value of assets and liabilities assumed in the business combination. Goodwill is not amortized, but rather is reviewed for impairment at least annually, or when events and circumstances indicate that it is more likely than not that the fair value of the reporting unit is less than its carrying value. The Company compares each reporting unit’s fair value, by considering comparable company market valuations and estimating expected future discounted cash flows to be generated by the reporting unit, to its carrying value. If the carrying value exceeds the reporting unit’s fair value, the Company performs an additional fair value measurement calculation to determine the impairment loss. The amount of impairment is determined by comparing the implied fair value of reporting unit goodwill to the carrying value of the goodwill.
	Goodwill was recognized in 2010 as a result of the acquisition of Tinet, and in October 2011, the Company established the Americas, EMEA, and APAC reporting units as part of an internal reorganization.  In the fourth quarter of 2012, we performed our annual goodwill impairment test. Factors that we considered in the fourth quarter of 2012 when estimating the fair value of the reporting units included (i) a decline in our common stock price beginning late in the third quarter of 2012 and sustained through the date of filing of our Annual Report on Form 10-K for the year ended December 31, 2012, which required an increase in the discount rate used in the present value calculation in order to reconcile our market capitalization to the aggregate estimated fair value of all of our reporting units, and (ii) a carrier dispute that was settled in the fourth quarter of 2012. We performed an impairment test of goodwill for each of our reporting units. The quantitative goodwill impairment test Step 1 was based upon the estimated fair value of our reporting units compared to the net carrying value of assets and liabilities of the reporting units. We used internal discounted cash flow estimates and considered market value comparisons to determine fair value. Because the fair value of the reporting units was below their carrying value, including goodwill, we performed an additional fair value measurement to determine the amount of impairment loss.   During the year ended December 31, 2012 the Company recorded goodwill impairment charges in each of its three reporting units, Americas, EMEA and APAC, in the amount of $44.5 million, $4.5 million and $0.5 million, respectively, which in total, resulted in a charge of $49.5 million. In the 2012 consolidated statement of operations, the amounts related to EMEA and APAC are recorded as part of discontinued operations and the amount related to Americas is recorded as part of continuing operations.
	Revenue Recognition —The Company generates revenue from sales of its voice services. The Company maintains tariffs and executed service agreements with each of its customers in which specific fees and rates are determined.  Voice revenue is recorded each month on an accrual basis based upon minutes of traffic switched by the Company’s network by each customer, which is referred to as minutes of use.  The rates charged per minute are determined by contracts between the Company and its customers, or by filed and effective tariffs.
	Prior to the sale of the Company’s global data business in April 2013, IP Transit and Ethernet services revenues that related to the Company’s Americas reporting were recorded each month on an accrual basis based upon bandwidth used by each customer. The rates charged were the total of a monthly fee for bandwidth (the Committed Traffic Rate) plus additional charges for the sustained peak bandwidth used monthly in excess of the Committed Traffic Rate.
	Earnings (Loss) Per Share —Basic earnings (loss) per share is computed based on the weighted average number of common shares and participating securities outstanding. Diluted earnings (loss) per share is computed based on the weighted average number of common shares and participating securities outstanding adjusted by the number of additional shares that would have been outstanding during the period had the potentially dilutive securities been issued.
	The following table presents a reconciliation of the numerators and denominators of basic and diluted earnings (loss) per share of common stock:
			Years Ended December 31,
	(In thousands, except per share amounts)		2014		2013			2012
	Numerator:
	Income (loss) from continuing operations		$	38,523	$	64,298		$	(34,246	)
	Loss from discontinued operations, net of provision for income taxes			—		(3,808	)		(43,903	)
	Loss on sale of discontinued operations, net of provision for income taxes			—		(4,837	)		—
	Net income (loss)		$	38,523	$	55,653		$	(78,149	)
	Denominator:
	Weighted average common shares outstanding			32,887		32,306			30,798
	Effect of dilutive securities:
	Stock options and non-vested shares			497		251			—
	Denominator for diluted earnings per share			33,384		32,557			30,798
	Earnings (loss) per share - continuing operations:
	Basic		$	1.17	$	1.99		$	(1.11	)
	Diluted		$	1.15	$	1.97		$	(1.11	)
	Loss per share - discontinued operations:
	Basic		$	—	$	(0.27	)	$	(1.43	)
	Diluted		$	—	$	(0.27	)	$	(1.43	)
	Earnings (loss) per share - net income:
	Basic		$	1.17	$	1.72		$	(2.54	)
	Diluted		$	1.15	$	1.71		$	(2.54	)
	For the year ended December 31, 2012, the Company was in a net loss position and, accordingly, the assumed exercise of 0.3 million stock options was excluded from diluted weighted average shares outstanding because their inclusion would have been anti-dilutive.
	Share-based awards of 0.6 million, 2.4 million, and 3.5 million were outstanding during the years ended December 31, 2014, 2013 and 2012, respectively, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive.
	For the years ended December 31, 2014 and 2013, the undistributed earnings allocable to participating securities were $0.3 million, $0.2 million, respectively. There were no undistributed earnings allocable to participating securities in 2012 as a result of the Company’s net loss.
	Accounting for Share-Based Payments —The fair value of stock options is determined using the Black-Scholes valuation model. This model takes into account the exercise price of the stock option, the fair value of the common stock underlying the stock option as measured on the date of grant and an estimation of the volatility of the common stock underlying the stock option. Such value is recognized as expense over the service period, net of estimated forfeitures, using the straight-line method. The estimation of stock awards that will ultimately vest requires judgment, and to the extent actual results or updated estimates differ from the Company’s current estimates, such amounts will be recorded as a cumulative adjustment in the period estimates are revised. The Company considers many factors when estimating expected forfeitures, including types of awards, employee class, and historical experience. Actual results, and future changes in estimates, may differ from the Company’s current estimates.
	The amount of non-cash share-based expense recorded in the years ended December 31, 2014, 2013 and 2012 was $4.3 million, $6.2 million, and $13.2 million, respectively.
	Compensation expense for non-vested shares is measured based upon the quoted closing market price for the stock on the date of grant. The compensation cost is recognized on a straight-line basis over the vesting period. Refer to Note 12 “Stock Options and Non-vested Shares.”
	Income Taxes —Deferred income tax assets and liabilities are recognized for future income tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases and for net operating loss and tax credit carryforwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in income tax rates is recorded in earnings in the period of enactment. A valuation allowance is provided for deferred income tax assets when it is more likely than not that future tax benefits will not be realized. Deferred income tax assets are reviewed on a quarterly basis to determine if a valuation allowance is necessary based on current and historical performance, along with other relevant factors.
	The income tax provision includes United States federal, state and local income taxes and is based on pre-tax income or loss.
	The Company recognizes the benefits of uncertain tax positions taken or expected to be taken in tax returns in the provision for income taxes only for those positions that are more likely than not to be realized. The Company follows a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately forecast actual outcomes. The Company’s policy is to include interest and penalties associated with income tax obligations in income tax expense.
	Foreign Currency Translation —As a result of the sale of global data business, the Company is paid and makes payments in U.S. Dollars and is no longer exposed to any significant foreign currency risk.
	Concentrations —For the years ended 2014, 2013 and 2012, the aggregate revenue of four customers accounted for 73%, 65% and 56% of total revenue from continuing operations, respectively. At December 31, 2014 and 2013, the aggregate accounts receivable of four customers accounted for 77% and 75% of the Company’s total trade accounts receivable balance, respectively.
	In 2014, the Company had two customers in excess of ten percent of revenue, which were 35% and 25% of the Company’s total revenue from continuing operations. At December 31, 2014, the Company had two customers that in aggregate accounted for 62% of the Company’s accounts receivable balance.
	In 2013, the Company had two customers in excess of ten percent of revenue, which were 34% and 20% of the Company’s total revenue from continuing operations. At December 31, 2013, the Company had two customers that in aggregate accounted for 61% of the Company’s accounts receivable balance.
	In 2012, the Company had two customers in excess of ten percent of revenue, which were 30% and 11% of the Company’s total revenue from continuing operations. At December 31, 2012, the Company had two customers that in aggregate accounted for 48% of the Company’s accounts receivable balance.
	Recent Accounting Pronouncements — In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The ASU is based on the principle that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to fulfill a contract. Entities have the option of using either a full retrospective or a modified retrospective approach for the adoption of the new standard. The ASU is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. The Company is currently assessing the impact of this standard on the Company’s financial position, results of operations and cash flows.
	In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern, which requires management to assess, at each annual and interim reporting period, the entity's ability to continue as a going concern within one year after the date that the financial statements are issued and provide related disclosures. The ASU is effective for the year ended December 31, 2016, with early adoption permitted. The Company has assessed the impact of this standard and does not believe that it will have a material impact on the Company’s consolidated financial statements or disclosures.
	No other new accounting pronouncement issued or effective during the fiscal year had or is expected to have a material impact on the consolidated financial statements.

BUSINESS_DISPOSITION

BUSINESS DISPOSITION	12 Months Ended
	Dec. 31, 2014
Discontinued Operations And Disposal Groups [Abstract]
BUSINESS DISPOSITION	3	BUSINESS DISPOSITION
	On April 30, 2013, the Company sold its global data business to GTT and, as a result, no longer provides data services. The transaction consisted of the sale of the Americas, EMEA and APAC reporting units’ data assets and liabilities. The data activity associated with the EMEA and APAC reporting units is reflected in the consolidated statements of operations and in the consolidated balance sheets as discontinued operations. Historical information related to these reporting units has been reclassified accordingly.  The Americas reporting unit of the global data business did not qualify for discontinued operations because it did not constitute a separate component of the Company. The data activity associated with the Americas reporting unit is reported in continuing operations in the consolidated statements of operations and consolidated balance sheets.
	The Company sold its global data business for $54.5 million, which consisted of $52.5 million in cash, subject to net working capital adjustments, and $2.0 million of non-cash commercial services to be provided by GTT to the Company over a three-year period. After an initial net working capital reduction of $3.3 million based on the balance sheet information as of March 31, 2013, the Company received $51.2 million of cash and non-cash services from GTT. Transaction costs and the additional net working capital adjustment, resulting from balance sheet changes during the month of April following the initial calculation, amounted to approximately $2.4 million and $1.0 million, respectively, reducing net cash and non-cash consideration to approximately $47.8 million. Of this amount, $43.5 million was allocated to the sale of the Americas reporting unit of the global data business and the remaining amount of $4.3 million was allocated to the EMEA and APAC reporting units of the global data business. The Company based its allocation of $47.8 million upon the relative percentage of the fair value of the Americas reporting unit and the EMEA and APAC reporting units, to the total fair value of these three reporting units combined.
	Subsequent to the date of sale, the Company and GTT disagreed over the amount of certain post-closing purchase price adjustment provisions in the agreement governing the sale of the Company’s global data business to GTT. GTT claimed that the Company owed GTT $3.8 million. The Company, however, believed that GTT owed the Company $1.1 million. During the three months ended March 31, 2014, the parties tentatively agreed to resolve their differences with respect to the post-closing adjustments to the purchase price in a manner that would require neither party to make a payment to the other and would waive all other claims. As a result of the tentative agreement, the Company reduced other assets by $1.1 million and charged $1.1 million to continuing operations within Loss on sale of Americas Data assets. During the three months ended September 30, 2014, the agreement was finalized. There were no accounting impacts as a result of the final agreement.
	Disposition Not Qualifying for Discontinued Operations
	The Americas reporting unit assets, which were sold as part of the sale of the global data business, had an approximate net book value of $14.7 million at the time of the sale.  The purchase price allocation of $43.5 million for this portion of the global data business, less its net book basis of assets and liabilities yielded a gain from sale of $28.8 million.
	Discontinued Operations
	The net book basis of the assets and liabilities for the EMEA and APAC reporting units of the global data business at the date of sale was approximately $10.1 million. In addition, the Company was entitled to approximately $1.0 million of cash that remained with the EMEA and APAC reporting units of the global data business at the time of the transaction. The purchase price allocation of $4.3 million for this portion of the global data business plus the additional $1.0 million of cash yielded a loss on the sale from discontinued operations of $4.8 million.
	The following table displays summarized activity in the Company’s consolidated statements of operations for discontinued operations during the years ended December 31, 2014, 2013 and 2012.
			Years Ended December 31,
			2014		2013			2012
	Revenue		$	—	$	15,205		$	42,450
	Operating loss			—		(3,130	)		(41,633	)
	Loss before provision for income taxes			—		(3,581	)		(41,946	)
	Provision for income tax			—		227			1,957
	Loss from discontinued operations			—		(3,808	)		(43,903	)
	Loss on sale of discontinued operations		$	—	$	(4,837	)	$	—
	The Company did not have any assets or liabilities related to its discontinued operations on its consolidated balance sheets as of December 31, 2014 or December 31, 2013.

PROPERTY_AND_EQUIPMENT

PROPERTY AND EQUIPMENT	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
PROPERTY AND EQUIPMENT	4	PROPERTY AND EQUIPMENT
	Property and equipment as of December 31, 2014 and 2013 consist of the following:
			December 31,
			2014			2013
	Network equipment		$	37,207		$	31,670
	Computer software			3,546			2,492
	Computer equipment			2,699			1,411
	Tools and test equipment			450			450
	Furniture and fixtures			352			349
	Leasehold improvements			1,533			1,484
	Wireless equipment			6			6
				45,793			37,862
	Less accumulated depreciation			(26,431	)		(14,766	)
				19,362			23,096
	Construction in process			4,316			2,719
	Property and equipment-net		$	23,678		$	25,815
	The carrying value of long-lived assets are reviewed whenever events or changes in circumstances indicate that the related carrying amounts may not be recoverable.

RECEIVABLES

RECEIVABLES	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
RECEIVABLES	5	RECEIVABLES
	Receivables as of December 31, 2014 and 2013 consist of the following:
			December 31,
			2014			2013
	Receivables		$	35,102		$	21,785
	Unbilled receivables			—			1,315
				35,102			23,100
	Less allowance for doubtful accounts			(2,336	)		(900	)
	Receivables—net of allowance for doubtful accounts		$	32,766		$	22,200
	The Company historically invoiced customers for voice services occurring either through the 24th of each month or through the end of each month. For customers with the billing cycle ending on the 24th of each month, the Company accrued revenue each month for voice services from the 25th through the end of the month, resulting in unbilled receivables. The unbilled receivables at the end of each month are billed as part of the following month’s billing cycle. During the quarter ended December 31, 2014, the Company migrated all invoices previously billed on the cycle ended the 24th of each month to a calendar month.  As a result, there are no unbilled receivables as of December 31, 2014.
	The allowance for doubtful accounts of $2.3 million as of December 31, 2014 increased $1.4 million from $0.9 million as of December 31, 2013 due to ongoing disputes with certain long-distance carriers that have challenged the validity of certain switched access charges.

FAIR_VALUE_MEASUREMENT

FAIR VALUE MEASUREMENT	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	6	FAIR VALUE MEASUREMENT
	The Company’s investment in three money market funds is recognized and disclosed at fair value in the financial statements on a recurring basis. Fair value is defined as the price that would be received to sell an asset in an orderly transaction between market participants as of the measurement date. Fair value is measured using the fair value hierarchy and related valuation methodologies as defined in the authoritative literature. This guidance specifies a hierarchy of valuation techniques based on whether the inputs to each measurement are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s assumptions about current market conditions. The prescribed fair value hierarchy and related valuation methodologies are as follows:
	Level 1 —Quoted prices for identical instruments in active markets.
	Level 2 —Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets.
	Level 3 —Valuations derived from valuation techniques, in which one or more significant inputs are unobservable.
	The fair value of the Company’s financial assets by level in the fair value hierarchy as of December 31, 2014 and 2013 was as follows:
	31-Dec-14		Level 1		Level 2		Level 3		Total
	Assets:
	Money Market Funds		$	71,836	$	—	$	—	$	71,836
	31-Dec-13		Level 1		Level 2		Level 3		Total
	Assets:
	Money Market Funds		$	41,827	$	—	$	—	$	41,827
	Valuation methodology
	Level 1—Quoted market prices in active markets are available for investments in money market funds. As such, these investments are classified within Level 1.

401k_SAVINGS_PLAN

401(k) SAVINGS PLAN	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
401(k) SAVINGS PLAN	7	401(k) SAVINGS PLAN
	The Company sponsors a 401(k) plan covering substantially all United States employees. The plan is a defined contribution savings plan in which employees may contribute up to 87% of their salary, subject to certain limitations. The Company may elect to make discretionary contributions into the Plan. The Company contributed $0.5 million to this plan during each of the years ended December 31, 2014, 2013 and 2012.

COMMON_STOCK

COMMON STOCK	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
COMMON STOCK	8	COMMON STOCK
	The Company’s total authorized capital stock consists of 150,000,000 shares of common stock, par value $0.001 per share.
	Voting —Each holder of common stock has one vote in respect to each share of stock held on record for the election of directors and on all matters submitted to a vote of shareholders of the Company.
	Dividends —Subject to the preferential rights of any outstanding preferred stock, the holders of shares of common stock are entitled to receive, when and if declared by the Board of Directors, out of assets of the Company which are by law available therefore, dividends payable either in cash, in property or in shares of capital stock. On October 5, 2012, the Company declared a special cash dividend of $3.00 per outstanding share of common stock, or $96.7 million in the aggregate, which was paid on October 30, 2012 (the 2012 Special Dividend). On May 29, 2013, the Company declared a special cash dividend of $1.25 per outstanding share of common stock, or $40.5 million in the aggregate, which was paid on June 28, 2013 (the 2013 Special Dividend). On May 29, 2013, August 27, 2013 and December 4, 2013, the Company also announced the declaration of regular quarterly dividends of $0.0625 per outstanding share of common stock, which were paid on June 24, 2013, September 27, 2013 and December 30, 2013, respectively. In 2013 the Company paid $6.0 million as a result of regular quarterly dividends. Total 2013 aggregate dividend payments, inclusive of a special cash dividend and regular quarterly dividends, of $46.5 million includes $0.6 million related to the expected forfeitures of non-vested shares that the Company has recognized as compensation expense.
	On February 27, 2014, May 21, 2014, August 13, 2014 and November 10, 2014, the Company also announced the declaration of regular quarterly dividends per outstanding share of common stock of $0.075, $0.075, $0.15 and $0.15, respectively.   The dividends were paid on March 27, 2014, June 26, 2014, September 24, 2014 and December 8, 2014, respectively. In 2014, the Company paid $14.9 million as a result of regular quarterly dividends. There was no special cash dividend declared in 2014 and the expected forfeitures of non-vested shares that the Company has recognized as compensation expense was less than $0.1 million.
	Liquidation —In the event of any liquidation, dissolution or winding up of the Company, after distribution in full of the preferential amounts, if any, to be distributed to the holders of shares of any outstanding preferred stock, holders of all common stock shares, including converted preferred stock, are entitled to receive all of the remaining assets of the Company of whatever kind available for distribution to shareholders ratably in proportion to the number of shares of common stock held by them respectively.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	9	COMMITMENTS AND CONTINGENCIES
	Operating Leases —The Company leases its facilities and certain equipment under operating leases which expire through March 2026. Rental expense was $4.3 million, $5.2 million and $5.2 million for each of the years ended December 2014, 2013 and 2012, respectively.
	The following table represents future lease payments under the operating leases:
	December 31,		2014
	2015		$	4,354
	2016			4,236
	2017			3,697
	2018			3,202
	2019			3,098
	Thereafter			7,254
	Total		$	25,841
	Service Purchase Commitment – We have a service agreement with a major telecommunications service provider, where we have committed to purchase a minimum amount of service beginning September 1, 2015 through September 30, 2018.
	Legal Proceedings —From time to time, the Company is a party to legal proceedings arising in the normal course of its business. Aside from the matters discussed below, the Company does not believe that it is a party to any pending legal action that could reasonably be expected to have a material adverse effect on its business or operating results, financial position or cash flows.
	Customer Dispute
	In 2013, the Company was engaged in a dispute with a carrier to which it provides certain voice services. The carrier is one of the Company’s largest customers and claimed the Company had been improperly billing a certain tariffed rate element. At the time the customer initiated the dispute, the customer alleged that the improper billings totaled over $6.0 million.
	On January 8, 2014, the Company and the customer settled the dispute. As part of the definitive settlement, the Company agreed to provide certain credits totaling approximately $5.0 million to the customer over an 18-month period beginning in January 2014. In exchange, the customer has agreed to send new revenue-generating traffic to the Company for a period of at least two years. The Company anticipates the revenue associated with the new traffic over this two-year period will largely offset or exceed the credits provided to the customer.
	Federal Securities Class Action
	On August 9, 2013, a federal securities class action lawsuit was filed against the Company in the United States District Court for the Northern District of Illinois (Tamara Holding Ltd., individually and on behalf of All Other Persons Similarly Situated v. Inteliquent, Inc., f/k/a Neutral Tandem Inc., G. Edward Evans, Robert Junkroski, and David Zwick, 13-CV-5701). The plaintiff alleged violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder relating to the matters addressed in an internal investigation conducted by the Audit Committee of the Company’s Board of Directors. On January 6, 2014, the plaintiff voluntarily dismissed the lawsuit without prejudice.

CREDIT_FACILITY

CREDIT FACILITY	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
CREDIT FACILITY	10	CREDIT FACILITY
	On March 5, 2013, the Company entered into a $15.0 million revolving credit facility. The credit facility has a term of three years and an interest rate of LIBOR + 3.25%. The Company may borrow under the revolving credit facility and use the funds for general corporate purposes. There were no obligations outstanding under the revolving credit facility at any time during the year ended December 31, 2014. As of December 31, 2014, the Company is in compliance with all of the covenants of the credit facility agreement.

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
INCOME TAXES	11	INCOME TAXES
	Income (loss) before provision for income taxes, and the related provision for income taxes, for the years ended December 31 2014, 2013 and 2012, were as follows:
			Years Ended December 31,
			2014			2013			2012
	Income (loss) before provision for income taxes		$	63,226		$	77,822		$	(32,288	)
	Provision for income taxes
	Current:
	Federal			21,728			15,391			8,864
	State			2,967			428			1,414
	Total current			24,695			15,819			10,278
	Deferred (prepaid):
	Federal			(200	)		(1,713	)		(5,817	)
	State			208			(582	)		1,934
	Foreign			—			—			(4,437	)
	Total deferred			8			(2,295	)		(8,320	)
	Total provision for income taxes		$	24,703		$	13,524		$	1,958
	The Company’s effective income tax rate was 39.1% for the year ended December 31, 2014, compared to 17.4% for the year ended December 31, 2013. This difference in rates results primarily due to the sale of the global data business during the year ended December 31, 2013. The change in the effective tax rate of 17.4% for the year ended December 31, 2013 compared to (6.1)% for the year ended December 31, 2012 was due to the sale of the global data business during the year ended December 31, 2013 and the goodwill impairment during the year ended December 31, 2012.
	A reconciliation of the federal statutory rate to our effective tax rate is as follows:
			December 31,
			2014			2013			2012
	Statutory federal rate			35	%		35	%		35	%
	State income tax, net of federal benefit			3.4	%		3.2	%		2.1	%
	Illinois state EDGE credit net of valuation allowance			(0.2	)%		(1.0	)%		(4.7	)%
	Impact of sale of global data business			0.7	%		(15.5	)%		—
	Goodwill impairment			—			—			(52.5	)%
	Americas Data assets allocation			—			(4.7	)%		15.7	%
	Other			0.2	%		0.4	%		(1.7	)%
	Effective income tax rate			39.1	%		17.4	%		(6.1	)%
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred income taxes are as follows:
			December 31,
			2014			2013
	Deferred tax assets and liabilities
	Deferred tax assets:
	Stock option compensation		$	5,232		$	9,084
	State credit carry forward			2,380			2,577
	Capital loss on sale of Tinet stock			21,580			21,405
	Accrued other			3,075			2,484
	Total deferred tax assets			32,267			35,550
	Deferred tax liabilities:
	Depreciation			(3,898	)		(5,091	)
	Prepaids			(732	)		(800	)
	Total deferred tax liabilities			(4,630	)		(5,891	)
	Subtotal			27,637			29,659
	Valuation allowance			(23,517	)		(23,444	)
	Net deferred income tax asset		$	4,120		$	6,215
	The Company evaluates its deferred income taxes quarterly to determine if a valuation allowance is required or should be adjusted. The Company assesses whether a valuation allowance should be established against deferred tax assets based upon consideration of all available evidence, both positive and negative, using a more likely than not standard. This assessment considers, among other matters, forecasts of future profitability, the duration of statutory carry-forward periods, the Company’s experience with tax attributes expiring unused and tax planning strategies. In making such judgments, significant weight is given to evidence that can be objectively verified.
	A valuation allowance has been established against the deferred tax asset resulting from the sale of Tinet stock and a partial valuation allowance has been established against the deferred income tax asset related to the Illinois EDGE credit. The valuation allowance of $21.6 million was established for the deferred tax asset related to the capital loss from the sale of Tinet stock after weighing all available evidence, both positive and negative, including the potential for the Company to have sufficient capital gains to be offset by the capital losses during the five year carryforward period. The Company’s Illinois EDGE credit can also be carried forward five years. During the year ended December 31, 2014, the Company released $0.1 million of the valuation allowance related to the Illinois EDGE credit. The Company now has a partial valuation allowance of $1.9 million for the Illinois EDGE credit deferred income tax asset as the Company believes it is more likely than not that future taxable income will be insufficient to realize the full benefit of the credit.
	The Company files income tax returns in the U.S. federal jurisdiction, and various state and local jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local income tax examinations by tax authorities for years before 2010. The IRS has completed an examination of the federal income tax return the Company filed for the year 2008.
	The Company’s liabilities for uncertain tax positions were $0.1 million at December 31, 2014 and totaled less than $0.1 million at December 31, 2013. This difference results from uncertain tax positions related to the research and development credits earned for 2013 and 2014. A reconciliation of the beginning and ending amount of uncertain tax positions is as follows:
			2014			2013
	Balance at January 1		$	40		$	1,839
	Increases related to prior periods			8			10
	Increases related to current year			27			—
	Decreases related to sale of the global data business			—			(1,809	)
	Balance on December 31		$	75		$	40
	The Company recognizes accrued interest and penalties related to its unrecognized tax benefits as income tax expense.

STOCK_OPTIONS_AND_NONVESTED_SH

STOCK OPTIONS AND NON-VESTED SHARES	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
STOCK OPTIONS AND NON-VESTED SHARES	12	STOCK OPTIONS AND NON-VESTED SHARES
	The Company established the 2003 Stock Option and Stock Incentive Plan (2003 Plan), which provided for issuance of up to 4.7 million options and non-vested shares to directors, employees, and other individuals (whether or not employees) who render services to the Company. In 2007 the Company adopted the Neutral Tandem, Inc. 2007 Long-Term Equity Incentive Plan (2007 Plan) and ceased awarding equity grants under the 2003 plan. As of December 31, 2014, the Company had granted a total of 1.7 million options and 0.4 million non-vested shares that remained outstanding under the 2007 Plan. Awards for 1.6 million shares, representing approximately 4.9% of the Company’s outstanding common stock as of December 31, 2014, remained available for additional grants under the 2007 Plan.
	In connection with the 2013 Special Dividend, to compensate holders of outstanding options for the reduction in the Company’s stock price that resulted from the payment of the 2013 Special Dividend, the Company’s Compensation Committee approved (i) an adjustment to the exercise price of outstanding options, subject to the limitations of Section 409A of the Internal Revenue Code, and (ii) the issuance of non-vested shares (available for issuance under the 2007 Plan) to holders of outstanding options with exercise prices that could not be fully adjusted because of the limitations of Section 409A of the Internal Revenue Code. The effect of the exercise price adjustment and the issuance of non-vested shares, taken together, was to provide each optionholder with the same economic value after the time that the Company’s common stock began trading ex-dividend as such optionholder had immediately prior to such time. As a result of these adjustments, the exercise price of the 3.5 million outstanding options under the Plans was reduced by an average of $1.08 per option, and the Company issued 0.1 million non-vested shares under the 2007 Plan to make optionholders whole.
	In 2012, the 2003 Plan was amended in connection with the 2012 Special Dividend to provide that, in order to prevent an extraordinary cash dividend like the 2012 Special Dividend from diluting the rights of optionholders, the Company’s Compensation Committee shall have the discretion to reduce the exercise price of outstanding options so long as any such adjustment does not increase the intrinsic value of any such option, as measured prior to the ex-dividend date of such extraordinary cash dividend. As a result of the amendment, the Company recognized $0.3 million of non-cash share-based compensation expense in 2013 in connection with 2013 Special Dividend. The options under the 2007 Plan were modified by the mandated antidilutive provisions contained in the 2007 Plan, and as a result, no additional non-cash share-based compensation expense was required to be recognized.
	The Company records stock-based compensation expense in connection with any grant of options and non-vested shares to its employees. The Company calculates the expense associated with its stock options and non-vested shares by determining the fair value of the options and non-vested shares.
	Options
	All options granted under the 2003 Plan and the 2007 Plan have an exercise price equal to the market value of the underlying common stock on the date of the grant. During the years ended December 31, 2014 and 2013, the Company granted less than 0.1 million and 0.7 million options at a weighted-average exercise price of $13.86 and $3.40, respectively.
	The fair value of each option granted is estimated on the date of grant using the Black-Scholes option pricing model. For the years ended December 31, 2014, 2013 and 2012, fair value of stock options was measured using the following assumptions:
			Years Ended December 31,
			2014			2013		2012
	Expected life		7.2 years			7.3 years		7.2 years
	Risk-free interest rate			2.10%			1.30%	1.1% - 1.6%
	Expected dividends			2.10%			0.00%		0.00%
	Volatility			60.00%			45.00%	50.5% - 55.9%
	The weighted-average fair value of options granted, as determined by using the Black-Scholes valuation model, during the period was $6.90, $1.64 and $1.40 for the years ended December 31, 2014, 2013 and 2012, respectively. The total grant date fair value of options that vested during years ended December 31, 2014, 2013 and 2012 was approximately $1.1 million, $2.4 million and $6.1 million, respectively. The total intrinsic value (market value of stock less option exercise price) of stock options exercised was $4.5 million, $0.9 million and $4.4 million during the years ended December 31, 2014, 2013 and 2012, respectively.
	The following summarizes activity under the Company’s stock option plan:
						Weighted		Aggregate		Weighted
						Average		Intrinsic		Average
			Shares			Exercise		Value		Remaining
			0			Price		$0		Term (yrs)
	Options outstanding — December 31, 2012			3,092		$	14.64
	Granted			716			3.4
	Exercised			(206	)		2.02
	Cancelled			(611	)		7.94
	Options outstanding — December 31, 2013			2,991			12.91
	Granted			41			13.86
	Exercised			(1,096	)		11.43
	Cancelled			(221	)		20.08
	Options outstanding — December 31, 2014			1,715		$	12.97	$	12,580		5.23
	Vested or expected to vest — December 31, 2014			1,704		$	13.02	$	12,422		5.21
	Exercisable — December 31, 2014			1,220		$	16.56	$	4,906		4.05
	The unrecognized compensation cost associated with options outstanding at December 31, 2014 and 2013 is $0.9 million and $1.7 million, respectively. The weighted average remaining term that the compensation will be recorded is 2.1 years as of December 31, 2014 and 2013.
	Non-vested Shares
	During the years ended December 31, 2014 and 2013, the Company’s Board of Directors granted approximately 0.2 million and 0.3 million non-vested shares, respectively, to members of the Company’s executive management team as well as various employees within the Company. The non-vested shares were issued as part of the 2007 Plan. The shares typically vest over a four-year period. The fair value of the non-vested shares is determined using the Company’s closing stock price on the grant date. Compensation cost, measured using the grant date fair value, is recognized over the requisite service period on a straight-line basis.
	A summary of the Company’s non-vested share activity and related information for the years ended December 31, 2014 and 2013 is as follows:
						Weighted		Aggregate
						Average		Intrinsic
			Shares			Grant Date		Value
			0			Fair Value		$0
	Non-vested shares outstanding — December 31, 2012			846		$	11.31
	Granted			332			5.5
	Vested			(442	)		11.45
	Cancelled			(259	)		6.79
	Non-vested shares outstanding — December 31, 2013			477		$	9.66
	Granted			226			13.04
	Vested			(307	)		10.59
	Cancelled			—			—
	Non-vested shares outstanding — December 31, 2014			396		$	10.87	$	7,773
	Non-vested shares vested or expected to vest —December 31, 2014			370		$	10.87	$	7,263
	The aggregate intrinsic value represents the total pre-tax intrinsic value based on the Company’s closing stock price of $19.63 on December 31, 2014. The amount changes based upon the fair market value of the Company’s common stock.
	The unrecognized compensation cost associated with non-vested shares at December 31, 2014 and 2013 was $3.3 million and $3.9 million, respectively. The weighted average remaining term that the compensation will be recorded is 2.0 years and 1.7 years as of December 31, 2014 and 2013, respectively.
	Non-cash compensation expense of $4.3 million recorded during the year ended December 31, 2014 included $3.3 million related to non-vested restricted shares and $1.0 million related to options. Non-cash compensation expense of $6.2 million recorded during the year ended December 31, 2013 included $2.4 million related non-vested restricted shares and $3.8 million related to options.

SEGMENT_AND_GEOGRAPHIC_INFORMA

SEGMENT AND GEOGRAPHIC INFORMATION	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
SEGMENT AND GEOGRAPHIC INFORMATION	13	SEGMENT AND GEOGRAPHIC INFORMATION
	Segment reporting establishes standards for reporting information about operating segments. Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision making group, in deciding how to allocate resources and in assessing performance.
	The Company’s chief operating decision maker is the Chief Executive Officer. The Chief Executive Officer reviews financial information presented on a consolidated basis. The Company operates in one industry segment, which is to provide voice interconnection services via the Company’s telecommunications network to fulfill customer agreements. Therefore, the Company has concluded that it has one operating segment.
	The following is a summary of geographical information as of and for the year ended December 31, 2014, 2013 and 2012:
			Years Ended December 31,
			2014		2013		2012
	Revenue from external customers:
	United States of America		$	220,508	$	209,310	$	224,931
	Other countries within Americas reporting unit			—		2,351		8,072
			$	220,508	$	211,661	$	233,003
	Long-lived assets:
	United States of America		$	23,678	$	25,660	$	43,823
	Other countries			—		155		—
			$	23,678	$	25,815	$	43,823
	The Company includes property and equipment in its long-lived assets.

QUARTERLY_FINANCIAL_DATA_UNAUD

QUARTERLY FINANCIAL DATA (UNAUDITED)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
QUARTERLY FINANCIAL DATA (UNAUDITED)	14	QUARTERLY FINANCIAL DATA (UNAUDITED)
			2014
			1st			2nd			3rd			4th
	Operating Results:
	Revenue		$	56,217		$	54,881		$	54,045		$	55,365
	Operating expense:
	Network and facilities expense (excluding depreciation			24,890			23,129			23,016			23,960
	and amortization)
	Operations			7,307			7,202			7,432			7,355
	Sales and marketing			676			818			1,048			722
	General and administrative			3,800			5,254			3,645			4,141
	Depreciation and amortization			3,141			3,010			2,985			2,681
	(Gain) loss on sale of property and equipment			—			(31	)		2			(31	)
	Loss on sale of Americas Data assets			1,081			—			—			—
	Total operating expense			40,895			39,382			38,128			38,828
	Income from operations			15,322			15,499			15,917			16,537
	Other expense (income):
	Interest expense			2			17			18			14
	Other (income)			—			(2	)		—			—
	Total other expense			2			15			18			14
	Income before provision for income taxes			15,320			15,484			15,899			16,523
	Provision for income taxes			6,127			6,036			6,123			6,417
	Net income		$	9,193		$	9,448		$	9,776		$	10,106
	Per Share Data:
	Earnings per common share-net income-basic		$	0.28		$	0.29		$	0.3		$	0.3
	Earnings per common share-net income-diluted		$	0.28		$	0.28		$	0.29		$	0.3
	Weighted average number of shares outstanding-basic			32,273			32,832			33,115			33,316
	Weighted average number of shares outstanding-diluted			32,616			33,369			33,343			33,785
			2013
			1st			2nd			3rd			4th
	Operating Results:
	Revenue		$	59,288		$	53,449		$	50,396		$	48,528
	Operating expense:
	Network and facilities expense (excluding depreciation			24,636			24,053			22,027			24,151
	and amortization)
	Operations			7,798			7,508			7,182			6,107
	Sales and marketing			2,034			1,526			1,090			904
	General and administrative			4,499			4,535			6,071			3,667
	Depreciation and amortization			4,513			3,699			3,293			3,147
	Loss (gain) on sale of property and equipment			—			223			3			(34	)
	Gain on sale of Americas Data assets			—			(23,171	)		—			(5,620	)
	Total operating expense			43,480			18,373			39,666			32,322
	Income from operations			15,808			35,076			10,730			16,206
	Other (income) expense:
	Interest (income) expense			(39	)		(13	)		(1	)		47
	Other expense (income)			5			(4	)		4			(1	)
	Total other (income) expense			(34	)		(17	)		3			46
	Income from continuing operations before provision for			15,842			35,093			10,727			16,160
	income taxes
	Provision for income taxes			3,606			741			4,177			5,000
	Income from continuing operations			12,236			34,352			6,550			11,160
	(Loss) income from discontinued operations, net of			(5,336	)		(1,698	)		(68	)		3,294
	provision for income taxes (1)
	Gain (loss) on sale of discontinued operations, net of			—			794			(11	)		(5,620	)
	provision for income taxes
	Net income		$	6,900		$	33,448		$	6,471		$	8,834
	Per Share Data:
	Earnings per common share-continuing operations-basic		$	0.38		$	1.05		$	0.2		$	0.35
	Earnings per common share-continuing operations-diluted		$	0.38		$	1.05		$	0.2		$	0.34
	Loss per common share-discontinued operations-basic (1)		$	(0.17	)	$	(0.03	)	$	—		$	(0.07	)
	Loss per common share-discontinued operations-diluted (1)		$	(0.16	)	$	(0.03	)	$	—		$	(0.07	)
	Earnings per common share-net income-basic (1)		$	0.21		$	1.02		$	0.2		$	0.27
	Earnings per common share-net income-diluted (1)		$	0.21		$	1.02		$	0.2		$	0.27
	Weighted average number of shares outstanding-basic			32,337			31,629			32,262			32,194
Weighted average number of shares outstanding-diluted			32,453			31,629			32,557			32,501
-1	Loss from discontinued operations, net of provision for income taxes, for the three months ended June 30, 2013 includes only one month of activity as compared to the three months in all preceding three-month periods.

SUBSEQUENT_EVENT

SUBSEQUENT EVENT	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
SUBSEQUENT EVENT	15.  SUBSEQUENT EVENT
	The Company announced on January 16, 2015 that the term of G. Edward Evans employment agreement with the Company dated April 1, 2011 (as amended, the “Employment Agreement”), will expire on March 31, 2015.
	The Company and Mr. Evans may enter into written separation and consulting agreements in connection with Mr. Evan’s departure.  However, at the time of filing this Annual Report on Form 10-K, the terms of such agreements have not been finalized and therefore the Company has not yet determined the accounting impact of his departure.

Schedule_II_Valuation_and_Qual

Schedule II: Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation And Qualifying Accounts [Abstract]
Schedule II: Valuation and Qualifying Accounts	Schedule II: Valuation and Qualifying Accounts
	The following table presents the valuation and qualifying account activity for the years ended December 31, 2014, 2013 and 2012:
		Balance at		Charged to					Balance at
	(In thousands)	January 1,		Earnings		Used			December 31,
	2014
	Allowance for doubtful accounts	$	900	$	1,925	$	(489	)	$	2,336
	2013
	Allowance for doubtful accounts	$	423	$	900	$	(423	)	$	900
	2012
	Allowance for doubtful accounts	$	1,015	$	423	$	(1,015	)	$	423
	Schedules not listed above have been omitted because the information required to be set forth therein is not applicable or is shown in the consolidated financial statements or notes thereto.
	(a)(3) Exhibits.
	See Index to Exhibits. The Exhibits listed in the accompanying Index to Exhibits are filed or incorporated by reference as part of this Annual Report on Form 10-K.
	The agreements and other documents filed as exhibits to this report are not intended to provide factual information or other disclosure other than with respect to the terms of the agreements or other documents themselves and you should not rely on them for that purpose. In particular, any representations and warranties made by us in these agreements or other documents were made solely within the specific context of the relevant agreement or document and may not describe the actual state of affairs as of the date they were made or at any other time.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation —The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Changes in Presentation	Changes in Presentation —On April 30, 2013, the Company sold its global data business to GTT for $54.5 million, subject to certain adjustments. The Company determined that the appropriate level in which to assess discontinued operations was at its reporting unit level. As such, the Company’s Europe, Middle East and Africa (EMEA) and Asia Pacific (APAC) reporting units of the global data business consist of results of operations and cash flows that can be clearly distinguished from the rest of the entity and are therefore reflected in the consolidated statements of operations and in the consolidated balance sheets as discontinued operations. Historical information related to these reporting units have been reclassified accordingly. The Americas reporting unit of the global data business does not consist of results of operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of the entity. This reporting unit does not qualify for discontinued operations accounting treatment. Therefore, the Americas reporting unit of the global data business is reported in continuing operations in the consolidated statements of operations and in the consolidated balance sheets. Refer to Note 3 “Business Disposition” for more information regarding the sale of the global data business.
Use of Estimates	Use of Estimates —The Company’s consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America. These accounting principles require management to make certain estimates and assumptions that can affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the periods presented. The Company believes that the estimates and assumptions upon which it relies are reasonable based upon information available to it at the time that these estimates and assumptions are made. To the extent there are material differences between these estimates and actual results, the Company’s consolidated financial statements will be affected.
Cash and Cash Equivalents	Cash and Cash Equivalents —The Company considers all highly liquid investments with an original maturity of 90 days or less to be cash equivalents. The carrying values of our cash and cash equivalents approximate fair value. At December 31, 2014, the Company had $32.9 million of cash in banks and $71.8 million in three money market funds. At December 31, 2013, the Company had $35.2 million of cash in banks and $41.8 million in three money market funds.
Fair Value Measurements	Fair Value Measurements —Certain assets and liabilities are required to be recorded at fair value on a recurring basis. Fair value is determined based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. Assets measured at fair value on a nonrecurring basis include long-lived assets held and used. The fair value of cash and cash equivalents, accounts receivable and accounts payable approximate their carrying values. The three-tier value hierarchy, which prioritizes valuation methodologies based on the reliability of the inputs, is:
	Level 1—Valuations based on quoted prices for identical assets and liabilities in active markets.
	Level 2—Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.
	Level 3—Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably available assumptions made by other market participants.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts—Accounts receivable consist of trade receivables recorded upon recognition of revenue from sales of voice services, reduced by reserves for estimated bad debts. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Credit is extended based on evaluation of the customer’s financial condition. We make judgments as to our ability to collect outstanding receivables and provide allowances for a portion of receivables when collection becomes doubtful. The specific identification method is applied to all significant outstanding invoices to determine this provision. At December 31, 2014 and December 31, 2013, our allowance for doubtful accounts was $2.3 million and $0.9 million, respectively.
Property and Equipment	Property and Equipment — Property and equipment is recorded at cost. These values are depreciated over the estimated useful lives of the individual assets using the straight-line method. Any gains and losses from the disposition of property and equipment are included in operations as incurred. The estimated useful life for network equipment and tools and test equipment is five years. The estimated useful life for computer equipment, computer software and furniture and fixtures is three years. Leasehold improvements are amortized on a straight-line basis over an estimated useful life of five years or the life of the lease, whichever is less. As discussed in further detail below, the impairment of long-lived assets is evaluated when events or changes in circumstances indicate that a potential impairment has occurred.
Long-lived Assets	Long-lived Assets —The carrying value of long-lived assets, including property and equipment, are reviewed whenever events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Impairment of assets with definite lives is generally determined by comparing projected undiscounted cash flows to be generated by the asset, or appropriate grouping of assets, to its carrying value. If an impairment is identified, a loss is recorded equal to the excess of the asset’s net book value over its fair value. The fair value becomes the new cost basis of the asset. Determining the extent of an impairment, if any, typically requires various estimates and assumptions including using management’s judgment, cash flows directly attributable to the asset, the useful life of the asset and residual value, if any. In addition, the remaining useful life of the impaired asset is revised, if necessary. There were no property and equipment or intangible asset impairment charges in 2014 or 2013.
	The decline in our stock price and related market capitalization beginning late in the third quarter of 2012 and sustained through the date of filing of our Annual Report on Form 10-K for the year ended December 31, 2012 created an indication of potential impairment. We utilized Accounting Standards Codification 360, Property, Plant and Equipment (ASC 360), guidance to test the long-lived assets for realizability. During the year ended December 31, 2012, the Company recorded property and equipment and intangible assets impairment charges of $13.2 million and $25.8 million, respectively, as a result of the impairment test performed during fourth quarter of 2012. The Company recorded property and equipment impairment charges in each of its three reporting units, Americas, EMEA and APAC, in the amount of $4.9 million, $7.8 million and $0.5 million, respectively. The Company also recorded intangible assets impairment charges in each of our three reporting units, Americas, EMEA and APAC, in the amount of $17.3 million, $7.7 million and $0.8 million, respectively. In the 2012 consolidated statement of operations, the amounts related to EMEA and APAC are recorded as part of discontinued operations and the amount related to Americas is recorded as part of continuing operations. In addition, the Company ceased its hosted services offering during the year-ended December 31, 2012. As the equipment had no further use in the Company’s network the Company recorded an asset impairment charge of $2.9 million to write-off the related assets.
Goodwill	Goodwill —Goodwill represents the excess of the purchase price of an acquired business over the fair value of assets and liabilities assumed in the business combination. Goodwill is not amortized, but rather is reviewed for impairment at least annually, or when events and circumstances indicate that it is more likely than not that the fair value of the reporting unit is less than its carrying value. The Company compares each reporting unit’s fair value, by considering comparable company market valuations and estimating expected future discounted cash flows to be generated by the reporting unit, to its carrying value. If the carrying value exceeds the reporting unit’s fair value, the Company performs an additional fair value measurement calculation to determine the impairment loss. The amount of impairment is determined by comparing the implied fair value of reporting unit goodwill to the carrying value of the goodwill.
	Goodwill was recognized in 2010 as a result of the acquisition of Tinet, and in October 2011, the Company established the Americas, EMEA, and APAC reporting units as part of an internal reorganization.  In the fourth quarter of 2012, we performed our annual goodwill impairment test. Factors that we considered in the fourth quarter of 2012 when estimating the fair value of the reporting units included (i) a decline in our common stock price beginning late in the third quarter of 2012 and sustained through the date of filing of our Annual Report on Form 10-K for the year ended December 31, 2012, which required an increase in the discount rate used in the present value calculation in order to reconcile our market capitalization to the aggregate estimated fair value of all of our reporting units, and (ii) a carrier dispute that was settled in the fourth quarter of 2012. We performed an impairment test of goodwill for each of our reporting units. The quantitative goodwill impairment test Step 1 was based upon the estimated fair value of our reporting units compared to the net carrying value of assets and liabilities of the reporting units. We used internal discounted cash flow estimates and considered market value comparisons to determine fair value. Because the fair value of the reporting units was below their carrying value, including goodwill, we performed an additional fair value measurement to determine the amount of impairment loss.   During the year ended December 31, 2012 the Company recorded goodwill impairment charges in each of its three reporting units, Americas, EMEA and APAC, in the amount of $44.5 million, $4.5 million and $0.5 million, respectively, which in total, resulted in a charge of $49.5 million. In the 2012 consolidated statement of operations, the amounts related to EMEA and APAC are recorded as part of discontinued operations and the amount related to Americas is recorded as part of continuing operations.
Revenue Recognition	Revenue Recognition —The Company generates revenue from sales of its voice services. The Company maintains tariffs and executed service agreements with each of its customers in which specific fees and rates are determined.  Voice revenue is recorded each month on an accrual basis based upon minutes of traffic switched by the Company’s network by each customer, which is referred to as minutes of use.  The rates charged per minute are determined by contracts between the Company and its customers, or by filed and effective tariffs.
	Prior to the sale of the Company’s global data business in April 2013, IP Transit and Ethernet services revenues that related to the Company’s Americas reporting were recorded each month on an accrual basis based upon bandwidth used by each customer. The rates charged were the total of a monthly fee for bandwidth (the Committed Traffic Rate) plus additional charges for the sustained peak bandwidth used monthly in excess of the Committed Traffic Rate.
Earnings (Loss) Per Share	Earnings (Loss) Per Share —Basic earnings (loss) per share is computed based on the weighted average number of common shares and participating securities outstanding. Diluted earnings (loss) per share is computed based on the weighted average number of common shares and participating securities outstanding adjusted by the number of additional shares that would have been outstanding during the period had the potentially dilutive securities been issued.
	The following table presents a reconciliation of the numerators and denominators of basic and diluted earnings (loss) per share of common stock:
		Years Ended December 31,
	(In thousands, except per share amounts)	2014		2013			2012
	Numerator:
	Income (loss) from continuing operations	$	38,523	$	64,298		$	(34,246	)
	Loss from discontinued operations, net of provision for income taxes		—		(3,808	)		(43,903	)
	Loss on sale of discontinued operations, net of provision for income taxes		—		(4,837	)		—
	Net income (loss)	$	38,523	$	55,653		$	(78,149	)
	Denominator:
	Weighted average common shares outstanding		32,887		32,306			30,798
	Effect of dilutive securities:
	Stock options and non-vested shares		497		251			—
	Denominator for diluted earnings per share		33,384		32,557			30,798
	Earnings (loss) per share - continuing operations:
	Basic	$	1.17	$	1.99		$	(1.11	)
	Diluted	$	1.15	$	1.97		$	(1.11	)
	Loss per share - discontinued operations:
	Basic	$	—	$	(0.27	)	$	(1.43	)
	Diluted	$	—	$	(0.27	)	$	(1.43	)
	Earnings (loss) per share - net income:
	Basic	$	1.17	$	1.72		$	(2.54	)
	Diluted	$	1.15	$	1.71		$	(2.54	)
	For the year ended December 31, 2012, the Company was in a net loss position and, accordingly, the assumed exercise of 0.3 million stock options was excluded from diluted weighted average shares outstanding because their inclusion would have been anti-dilutive.
	Share-based awards of 0.6 million, 2.4 million, and 3.5 million were outstanding during the years ended December 31, 2014, 2013 and 2012, respectively, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive.
	For the years ended December 31, 2014 and 2013, the undistributed earnings allocable to participating securities were $0.3 million, $0.2 million, respectively. There were no undistributed earnings allocable to participating securities in 2012 as a result of the Company’s net loss.
Accounting for Share-Based Payments	Accounting for Share-Based Payments —The fair value of stock options is determined using the Black-Scholes valuation model. This model takes into account the exercise price of the stock option, the fair value of the common stock underlying the stock option as measured on the date of grant and an estimation of the volatility of the common stock underlying the stock option. Such value is recognized as expense over the service period, net of estimated forfeitures, using the straight-line method. The estimation of stock awards that will ultimately vest requires judgment, and to the extent actual results or updated estimates differ from the Company’s current estimates, such amounts will be recorded as a cumulative adjustment in the period estimates are revised. The Company considers many factors when estimating expected forfeitures, including types of awards, employee class, and historical experience. Actual results, and future changes in estimates, may differ from the Company’s current estimates.
	The amount of non-cash share-based expense recorded in the years ended December 31, 2014, 2013 and 2012 was $4.3 million, $6.2 million, and $13.2 million, respectively.
	Compensation expense for non-vested shares is measured based upon the quoted closing market price for the stock on the date of grant. The compensation cost is recognized on a straight-line basis over the vesting period. Refer to Note 12 “Stock Options and Non-vested Shares.”
Income Taxes	Income Taxes —Deferred income tax assets and liabilities are recognized for future income tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases and for net operating loss and tax credit carryforwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in income tax rates is recorded in earnings in the period of enactment. A valuation allowance is provided for deferred income tax assets when it is more likely than not that future tax benefits will not be realized. Deferred income tax assets are reviewed on a quarterly basis to determine if a valuation allowance is necessary based on current and historical performance, along with other relevant factors.
	The income tax provision includes United States federal, state and local income taxes and is based on pre-tax income or loss.
	The Company recognizes the benefits of uncertain tax positions taken or expected to be taken in tax returns in the provision for income taxes only for those positions that are more likely than not to be realized. The Company follows a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately forecast actual outcomes. The Company’s policy is to include interest and penalties associated with income tax obligations in income tax expense.
Foreign Currency Translation	Foreign Currency Translation —As a result of the sale of global data business, the Company is paid and makes payments in U.S. Dollars and is no longer exposed to any significant foreign currency risk.
Concentration	Concentrations —For the years ended 2014, 2013 and 2012, the aggregate revenue of four customers accounted for 73%, 65% and 56% of total revenue from continuing operations, respectively. At December 31, 2014 and 2013, the aggregate accounts receivable of four customers accounted for 77% and 75% of the Company’s total trade accounts receivable balance, respectively.
	In 2014, the Company had two customers in excess of ten percent of revenue, which were 35% and 25% of the Company’s total revenue from continuing operations. At December 31, 2014, the Company had two customers that in aggregate accounted for 62% of the Company’s accounts receivable balance.
	In 2013, the Company had two customers in excess of ten percent of revenue, which were 34% and 20% of the Company’s total revenue from continuing operations. At December 31, 2013, the Company had two customers that in aggregate accounted for 61% of the Company’s accounts receivable balance.
	In 2012, the Company had two customers in excess of ten percent of revenue, which were 30% and 11% of the Company’s total revenue from continuing operations. At December 31, 2012, the Company had two customers that in aggregate accounted for 48% of the Company’s accounts receivable balance.
Recent Accounting Pronouncements	Recent Accounting Pronouncements — In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The ASU is based on the principle that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to fulfill a contract. Entities have the option of using either a full retrospective or a modified retrospective approach for the adoption of the new standard. The ASU is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. The Company is currently assessing the impact of this standard on the Company’s financial position, results of operations and cash flows.
	In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern, which requires management to assess, at each annual and interim reporting period, the entity's ability to continue as a going concern within one year after the date that the financial statements are issued and provide related disclosures. The ASU is effective for the year ended December 31, 2016, with early adoption permitted. The Company has assessed the impact of this standard and does not believe that it will have a material impact on the Company’s consolidated financial statements or disclosures.
	No other new accounting pronouncement issued or effective during the fiscal year had or is expected to have a material impact on the consolidated financial statements.

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Earnings (Loss) Per Share	The following table presents a reconciliation of the numerators and denominators of basic and diluted earnings (loss) per share of common stock:
		Years Ended December 31,
	(In thousands, except per share amounts)	2014		2013			2012
	Numerator:
	Income (loss) from continuing operations	$	38,523	$	64,298		$	(34,246	)
	Loss from discontinued operations, net of provision for income taxes		—		(3,808	)		(43,903	)
	Loss on sale of discontinued operations, net of provision for income taxes		—		(4,837	)		—
	Net income (loss)	$	38,523	$	55,653		$	(78,149	)
	Denominator:
	Weighted average common shares outstanding		32,887		32,306			30,798
	Effect of dilutive securities:
	Stock options and non-vested shares		497		251			—
	Denominator for diluted earnings per share		33,384		32,557			30,798
	Earnings (loss) per share - continuing operations:
	Basic	$	1.17	$	1.99		$	(1.11	)
	Diluted	$	1.15	$	1.97		$	(1.11	)
	Loss per share - discontinued operations:
	Basic	$	—	$	(0.27	)	$	(1.43	)
	Diluted	$	—	$	(0.27	)	$	(1.43	)
	Earnings (loss) per share - net income:
	Basic	$	1.17	$	1.72		$	(2.54	)
	Diluted	$	1.15	$	1.71		$	(2.54	)

BUSINESS_DISPOSITION_Tables

BUSINESS DISPOSITION (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations And Disposal Groups [Abstract]
Summarized Activity in Company's Consolidated Statements of Income and Summary of Assets and Liabilities for Discontinued Operations	The following table displays summarized activity in the Company’s consolidated statements of operations for discontinued operations during the years ended December 31, 2014, 2013 and 2012.
		Years Ended December 31,
		2014		2013			2012
	Revenue	$	—	$	15,205		$	42,450
	Operating loss		—		(3,130	)		(41,633	)
	Loss before provision for income taxes		—		(3,581	)		(41,946	)
	Provision for income tax		—		227			1,957
	Loss from discontinued operations		—		(3,808	)		(43,903	)
	Loss on sale of discontinued operations	$	—	$	(4,837	)	$	—

PROPERTY_AND_EQUIPMENT_Tables

PROPERTY AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment as of December 31, 2014 and 2013 consist of the following:
		December 31,
		2014			2013
	Network equipment	$	37,207		$	31,670
	Computer software		3,546			2,492
	Computer equipment		2,699			1,411
	Tools and test equipment		450			450
	Furniture and fixtures		352			349
	Leasehold improvements		1,533			1,484
	Wireless equipment		6			6
			45,793			37,862
	Less accumulated depreciation		(26,431	)		(14,766	)
			19,362			23,096
	Construction in process		4,316			2,719
	Property and equipment-net	$	23,678		$	25,815

RECEIVABLES_Tables

RECEIVABLES (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Receivables	Receivables as of December 31, 2014 and 2013 consist of the following:
		December 31,
		2014			2013
	Receivables	$	35,102		$	21,785
	Unbilled receivables		—			1,315
			35,102			23,100
	Less allowance for doubtful accounts		(2,336	)		(900	)
	Receivables—net of allowance for doubtful accounts	$	32,766		$	22,200

FAIR_VALUE_MEASUREMENT_Tables

FAIR VALUE MEASUREMENT (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value of Company's Financial Assets by Level in Fair Value Hierarchy	The fair value of the Company’s financial assets by level in the fair value hierarchy as of December 31, 2014 and 2013 was as follows:
	31-Dec-14	Level 1		Level 2		Level 3		Total
	Assets:
	Money Market Funds	$	71,836	$	—	$	—	$	71,836
	31-Dec-13	Level 1		Level 2		Level 3		Total
	Assets:
	Money Market Funds	$	41,827	$	—	$	—	$	41,827

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Future Lease Payments of Operating Leases	The following table represents future lease payments under the operating leases:
	December 31,	2014
	2015	$	4,354
	2016		4,236
	2017		3,697
	2018		3,202
	2019		3,098
	Thereafter		7,254
	Total	$	25,841

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Before Income Tax, Domestic and Foreign	Income (loss) before provision for income taxes, and the related provision for income taxes, for the years ended December 31 2014, 2013 and 2012, were as follows:
		Years Ended December 31,
		2014			2013			2012
	Income (loss) before provision for income taxes	$	63,226		$	77,822		$	(32,288	)
	Provision for income taxes
	Current:
	Federal		21,728			15,391			8,864
	State		2,967			428			1,414
	Total current		24,695			15,819			10,278
	Deferred (prepaid):
	Federal		(200	)		(1,713	)		(5,817	)
	State		208			(582	)		1,934
	Foreign		—			—			(4,437	)
	Total deferred		8			(2,295	)		(8,320	)
	Total provision for income taxes	$	24,703		$	13,524		$	1,958
Effective Income Tax Rate Reconciliation	A reconciliation of the federal statutory rate to our effective tax rate is as follows:
		December 31,
		2014			2013			2012
	Statutory federal rate		35	%		35	%		35	%
	State income tax, net of federal benefit		3.4	%		3.2	%		2.1	%
	Illinois state EDGE credit net of valuation allowance		(0.2	)%		(1.0	)%		(4.7	)%
	Impact of sale of global data business		0.7	%		(15.5	)%		—
	Goodwill impairment		—			—			(52.5	)%
	Americas Data assets allocation		—			(4.7	)%		15.7	%
	Other		0.2	%		0.4	%		(1.7	)%
	Effective income tax rate		39.1	%		17.4	%		(6.1	)%
Deferred Tax Assets and Liabilities	Significant components of the Company’s deferred income taxes are as follows:
		December 31,
		2014			2013
	Deferred tax assets and liabilities
	Deferred tax assets:
	Stock option compensation	$	5,232		$	9,084
	State credit carry forward		2,380			2,577
	Capital loss on sale of Tinet stock		21,580			21,405
	Accrued other		3,075			2,484
	Total deferred tax assets		32,267			35,550
	Deferred tax liabilities:
	Depreciation		(3,898	)		(5,091	)
	Prepaids		(732	)		(800	)
	Total deferred tax liabilities		(4,630	)		(5,891	)
	Subtotal		27,637			29,659
	Valuation allowance		(23,517	)		(23,444	)
	Net deferred income tax asset	$	4,120		$	6,215
Reconciliation of Beginning and Ending Amount of Uncertain Tax Positions	A reconciliation of the beginning and ending amount of uncertain tax positions is as follows:
		2014			2013
	Balance at January 1	$	40		$	1,839
	Increases related to prior periods		8			10
	Increases related to current year		27			—
	Decreases related to sale of the global data business		—			(1,809	)
	Balance on December 31	$	75		$	40

STOCK_OPTIONS_AND_NONVESTED_SH1

STOCK OPTIONS AND NON-VESTED SHARES (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Assumptions Used to Estimate Fair Value of Stock Options	The fair value of each option granted is estimated on the date of grant using the Black-Scholes option pricing model. For the years ended December 31, 2014, 2013 and 2012, fair value of stock options was measured using the following assumptions:
		Years Ended December 31,
		2014			2013		2012
	Expected life	7.2 years			7.3 years		7.2 years
	Risk-free interest rate		2.10%			1.30%	1.1% - 1.6%
	Expected dividends		2.10%			0.00%		0.00%
	Volatility		60.00%			45.00%	50.5% - 55.9%
Stock Option Plan Activity	The following summarizes activity under the Company’s stock option plan:
					Weighted		Aggregate		Weighted
					Average		Intrinsic		Average
		Shares			Exercise		Value		Remaining
		0			Price		$0		Term (yrs)
	Options outstanding — December 31, 2012		3,092		$	14.64
	Granted		716			3.4
	Exercised		(206	)		2.02
	Cancelled		(611	)		7.94
	Options outstanding — December 31, 2013		2,991			12.91
	Granted		41			13.86
	Exercised		(1,096	)		11.43
	Cancelled		(221	)		20.08
	Options outstanding — December 31, 2014		1,715		$	12.97	$	12,580		5.23
	Vested or expected to vest — December 31, 2014		1,704		$	13.02	$	12,422		5.21
	Exercisable — December 31, 2014		1,220		$	16.56	$	4,906		4.05
Non-Vested Share Activity	A summary of the Company’s non-vested share activity and related information for the years ended December 31, 2014 and 2013 is as follows:
					Weighted		Aggregate
					Average		Intrinsic
		Shares			Grant Date		Value
		0			Fair Value		$0
	Non-vested shares outstanding — December 31, 2012		846		$	11.31
	Granted		332			5.5
	Vested		(442	)		11.45
	Cancelled		(259	)		6.79
	Non-vested shares outstanding — December 31, 2013		477		$	9.66
	Granted		226			13.04
	Vested		(307	)		10.59
	Cancelled		—			—
	Non-vested shares outstanding — December 31, 2014		396		$	10.87	$	7,773
	Non-vested shares vested or expected to vest —December 31, 2014		370		$	10.87	$	7,263

SEGMENT_AND_GEOGRAPHIC_INFORMA1

SEGMENT AND GEOGRAPHIC INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Summary of Geographical Information	The following is a summary of geographical information as of and for the year ended December 31, 2014, 2013 and 2012:
		Years Ended December 31,
		2014		2013		2012
	Revenue from external customers:
	United States of America	$	220,508	$	209,310	$	224,931
	Other countries within Americas reporting unit		—		2,351		8,072
		$	220,508	$	211,661	$	233,003
	Long-lived assets:
	United States of America	$	23,678	$	25,660	$	43,823
	Other countries		—		155		—
		$	23,678	$	25,815	$	43,823

QUARTERLY_FINANCIAL_DATA_UNAUD1

QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data
			2014
			1st			2nd			3rd			4th
	Operating Results:
	Revenue		$	56,217		$	54,881		$	54,045		$	55,365
	Operating expense:
	Network and facilities expense (excluding depreciation			24,890			23,129			23,016			23,960
	and amortization)
	Operations			7,307			7,202			7,432			7,355
	Sales and marketing			676			818			1,048			722
	General and administrative			3,800			5,254			3,645			4,141
	Depreciation and amortization			3,141			3,010			2,985			2,681
	(Gain) loss on sale of property and equipment			—			(31	)		2			(31	)
	Loss on sale of Americas Data assets			1,081			—			—			—
	Total operating expense			40,895			39,382			38,128			38,828
	Income from operations			15,322			15,499			15,917			16,537
	Other expense (income):
	Interest expense			2			17			18			14
	Other (income)			—			(2	)		—			—
	Total other expense			2			15			18			14
	Income before provision for income taxes			15,320			15,484			15,899			16,523
	Provision for income taxes			6,127			6,036			6,123			6,417
	Net income		$	9,193		$	9,448		$	9,776		$	10,106
	Per Share Data:
	Earnings per common share-net income-basic		$	0.28		$	0.29		$	0.3		$	0.3
	Earnings per common share-net income-diluted		$	0.28		$	0.28		$	0.29		$	0.3
	Weighted average number of shares outstanding-basic			32,273			32,832			33,115			33,316
	Weighted average number of shares outstanding-diluted			32,616			33,369			33,343			33,785
			2013
			1st			2nd			3rd			4th
	Operating Results:
	Revenue		$	59,288		$	53,449		$	50,396		$	48,528
	Operating expense:
	Network and facilities expense (excluding depreciation			24,636			24,053			22,027			24,151
	and amortization)
	Operations			7,798			7,508			7,182			6,107
	Sales and marketing			2,034			1,526			1,090			904
	General and administrative			4,499			4,535			6,071			3,667
	Depreciation and amortization			4,513			3,699			3,293			3,147
	Loss (gain) on sale of property and equipment			—			223			3			(34	)
	Gain on sale of Americas Data assets			—			(23,171	)		—			(5,620	)
	Total operating expense			43,480			18,373			39,666			32,322
	Income from operations			15,808			35,076			10,730			16,206
	Other (income) expense:
	Interest (income) expense			(39	)		(13	)		(1	)		47
	Other expense (income)			5			(4	)		4			(1	)
	Total other (income) expense			(34	)		(17	)		3			46
	Income from continuing operations before provision for			15,842			35,093			10,727			16,160
	income taxes
	Provision for income taxes			3,606			741			4,177			5,000
	Income from continuing operations			12,236			34,352			6,550			11,160
	(Loss) income from discontinued operations, net of			(5,336	)		(1,698	)		(68	)		3,294
	provision for income taxes (1)
	Gain (loss) on sale of discontinued operations, net of			—			794			(11	)		(5,620	)
	provision for income taxes
	Net income		$	6,900		$	33,448		$	6,471		$	8,834
	Per Share Data:
	Earnings per common share-continuing operations-basic		$	0.38		$	1.05		$	0.2		$	0.35
	Earnings per common share-continuing operations-diluted		$	0.38		$	1.05		$	0.2		$	0.34
	Loss per common share-discontinued operations-basic (1)		$	(0.17	)	$	(0.03	)	$	—		$	(0.07	)
	Loss per common share-discontinued operations-diluted (1)		$	(0.16	)	$	(0.03	)	$	—		$	(0.07	)
	Earnings per common share-net income-basic (1)		$	0.21		$	1.02		$	0.2		$	0.27
	Earnings per common share-net income-diluted (1)		$	0.21		$	1.02		$	0.2		$	0.27
	Weighted average number of shares outstanding-basic			32,337			31,629			32,262			32,194
Weighted average number of shares outstanding-diluted			32,453			31,629			32,557			32,501
-1	Loss from discontinued operations, net of provision for income taxes, for the three months ended June 30, 2013 includes only one month of activity as compared to the three months in all preceding three-month periods.

Description_of_the_Business_Ad

Description of the Business - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Apr. 30, 2013	Dec. 31, 2013
Business Combinations [Abstract]
Proceeds from sale of business	$54,500,000
Proceed from sale of business, cash	52,500,000	42,587,000
Sale of business non-cash consideration	2,000,000
Period of free service provided	3 years
Divestiture related costs included in gain on sale of business	$2,400,000

Recovered_Sheet1

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
Share data in Millions, unless otherwise specified	Apr. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Unit	Customer	Customer	Unit
		Investment	Investment	Customer
Summary Of Significant Accounting Policies [Line Items]
Proceeds from sale of business	$54,500,000
Cash in banks		32,900,000	35,200,000
Money market mutual funds		71,800,000	41,800,000
Number of money market mutual fund invested		3	3
Allowance for doubtful accounts		2,336,000	900,000
Impairment of property and equipment		0	0	13,200,000
Impairment of intangible asset		0	0	25,800,000
Number of reporting units	3			3
Impairment of goodwill		0	0	44,543,000
Impairment of goodwill				49,500,000
Undistributed earnings (loss) allocable to participating securities		300,000	200,000	0
Share-based expense		4,300,000	6,200,000	13,200,000
Percentage of tax benefit realized upon settlement		50.00%
Number of customers		2	2	2
Sales | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Number of customers		4	4	4
Concentration risks percentage		73.00%	65.00%	56.00%
Sales | Customer Concentration Risk | Customer 1
Summary Of Significant Accounting Policies [Line Items]
Concentration risks percentage		35.00%	34.00%	30.00%
Sales | Customer Concentration Risk | Customer 2
Summary Of Significant Accounting Policies [Line Items]
Concentration risks percentage		25.00%	20.00%	11.00%
Accounts Receivable | Credit Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risks percentage		77.00%	75.00%
Number of customers		4	4
Accounts Receivable | Credit Concentration Risk | Two Major Customers
Summary Of Significant Accounting Policies [Line Items]
Concentration risks percentage		62.00%	61.00%	48.00%
Number of major customers		2	2	2
Stock Options
Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive securities not included in the computation of diluted earnings per share				0.3
Share-based awards
Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive securities not included in the computation of diluted earnings per share		0.6	2.4	3.5
Hosted Services
Summary Of Significant Accounting Policies [Line Items]
Asset impairment charge				2,900,000
Americas
Summary Of Significant Accounting Policies [Line Items]
Impairment of property and equipment				4,900,000
Impairment of intangible asset				17,300,000
Impairment of goodwill				44,500,000
EMEA
Summary Of Significant Accounting Policies [Line Items]
Impairment of property and equipment				7,800,000
Impairment of intangible asset				7,700,000
Impairment of goodwill				4,500,000
APAC
Summary Of Significant Accounting Policies [Line Items]
Impairment of property and equipment				500,000
Impairment of intangible asset				800,000
Impairment of goodwill				$500,000
Network Equipment And Tools And Test Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives, years		5 years
Computer equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives, years		3 years
Computer software
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives, years		3 years
Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives, years		3 years
Leasehold Improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives, description		Five years or the life of the lease, whichever is less

Earnings_Per_Share_Detail

Earnings Per Share (Detail) (USD $)	0 Months Ended	3 Months Ended												12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 30, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Income (loss) from continuing operations						$11,160		$6,550		$34,352		$12,236		$38,523	$64,298	($34,246)
Loss from discontinued operations, net of provision for income taxes						3,294	[1]	-68	[1]	-1,698	[1]	-5,336	[1]		-3,808	-43,903
Loss on sale of discontinued operations, net of provision for income taxes	-4,800					-5,620		-11		794					-4,837
Net income (loss)		$10,106	$9,776	$9,448	$9,193	$8,834		$6,471		$33,448		$6,900		$38,523	$55,653	($78,149)
Weighted average common shares outstanding		33,316	33,115	32,832	32,273	32,194		32,262		31,629		32,337		32,887,000	32,306,000	30,798,000
Stock options and non-vested shares														497,000	251,000
Denominator for diluted earnings per share		33,785	33,343	33,369	32,616	32,501		32,557		31,629		32,453		33,384,000	32,557,000	30,798,000
Earnings (loss) per share - continuing operations:
Basic						$0.35		$0.20		$1.05		$0.38		$1.17	$1.99	($1.11)
Diluted						$0.34		$0.20		$1.05		$0.38		$1.15	$1.97	($1.11)
Loss per share - discontinued operations:
Basic						($0.07)	[1]			($0.03)	[1]	($0.17)	[1]		($0.27)	($1.43)
Diluted						($0.07)	[1]			($0.03)	[1]	($0.16)	[1]		($0.27)	($1.43)
Earnings (loss) per share - net income:
Basic		$0.30	$0.30	$0.29	$0.28	$0.27	[1]	$0.20	[1]	$1.02	[1]	$0.21	[1]	$1.17	$1.72	($2.54)
Diluted		$0.30	$0.29	$0.28	$0.28	$0.27	[1]	$0.20	[1]	$1.02	[1]	$0.21	[1]	$1.15	$1.71	($2.54)
[1]	Loss from discontinued operations, net of provision for income taxes, for the three months ended June 30, 2013 includes only one month of activity as compared to the three months in all preceding three-month periods.

Business_Disposition_Additiona

Business Disposition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended				12 Months Ended
	Apr. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Unit							Unit
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business	$54,500,000
Proceed from sale of business, cash	52,500,000						42,587,000
Sale of business non-cash consideration	2,000,000
Period of free service provided	3 years
Proceeds from business after working capital adjustment	3,300,000
Proceeds from sale of discontinued operations	51,200,000
Transaction costs from sale of business	2,400,000
Working capital adjustment	1,000,000
Proceeds from sale of business net of working capital adjustment and transaction cost	47,800,000
Number of reporting units	3							3
Claims pursuant to post closing purchase price adjustment by GTT	3,800,000
Due from GTT related to post closing purchase price adjustment	1,100,000
Reduction in other assets						247,000	-180,000	3,635,000
Gain (Loss) on sale of asset held for sale	28,800,000	-1,081,000	5,620,000		23,171,000	-1,081,000	28,791,000
Book value of asset held for sale	14,700,000
Purchase Price Allocation	4,300,000
Disposal group of business plus additional cash	1,000,000
Gain (Loss) on sale of the global data business	-4,800,000		-5,620,000	-11,000	794,000		-4,837,000
Americas
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of asset held for sale	43,500,000
Reduction in other assets	1,100,000
Gain (Loss) on sale of asset held for sale	1,100,000
EMEA and APAC
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations	4,300,000
Book value of asset held for sale	10,100,000
Disposal group including discontinued operation cash and cash equivalents	$1,000,000

Summarized_Activity_in_Consoli

Summarized Activity in Consolidated Statements of Income for Discontinued Operations (Detail) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2013	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations And Disposal Groups [Abstract]
Revenue										$15,205	$42,450
Operating loss										-3,130	-41,633
Loss before provision for income taxes										-3,581	-41,946
Provision for income tax										227	1,957
Loss from discontinued operations, net of provision for income taxes		3,294	[1]	-68	[1]	-1,698	[1]	-5,336	[1]	-3,808	-43,903
Loss on sale of discontinued operations, net of provision for income taxes	($4,800)	($5,620)		($11)		$794				($4,837)
[1]	Loss from discontinued operations, net of provision for income taxes, for the three months ended June 30, 2013 includes only one month of activity as compared to the three months in all preceding three-month periods.

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$45,793	$37,862
Less accumulated depreciation	-26,431	-14,766
Property and equipment, net excluding construction in process	19,362	23,096
Construction in process	4,316	2,719
Property and equipment-net	23,678	25,815	43,823
Network equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,207	31,670
Computer software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,546	2,492
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,699	1,411
Tools and test equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	450	450
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	352	349
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,533	1,484
Wireless
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$6	$6

Receivables_Detail

Receivables (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Receivables	$35,102,000	$21,785,000
Unbilled receivables	0	1,315,000
Gross receivables	35,102,000	23,100,000
Less allowance for doubtful accounts	-2,336,000	-900,000
Receivables—net of allowance for doubtful accounts	$32,766,000	$22,200,000

Receivables_Additional_Informa

Receivables - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Unbilled receivables	$0	$1,315,000
Allowance for doubtful accounts	2,336,000	900,000
Allowance for doubtful accounts increased	$1,400,000

Fair_Value_of_Companys_Financi

Fair Value of Company's Financial Assets by Level in Fair Value Hierarchy (Detail) (Fair Value, Measurements, Recurring, Money Market Funds, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:
Assets, fair Value	$71,836	$41,827
Level 1
Assets:
Assets, fair Value	$71,836	$41,827

401k_Savings_Plan_Additional_I

401(k) Savings Plan - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation And Retirement Disclosure [Abstract]
Defined benefit plan, employees' contribution in percentage, maximum	87.00%
Employer's contribution to 401 (k) defined contribution saving plan	$0.50	$0.50	$0.50

Common_Stock_Additional_Inform

Common Stock - Additional Information (Detail) (USD $)

0 Months Ended

3 Months Ended

12 Months Ended

Nov. 10, 2014

Aug. 13, 2014

21-May-14

Feb. 27, 2014

Dec. 04, 2013

Aug. 27, 2013

29-May-13

Oct. 05, 2012

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Class Of Stock [Line Items]

Common stock, authorized shares

150,000,000

150,000,000

150,000,000

Common stock, par value

$0.00

$0.00

$0.00

Common stock voting rights

Each holder of common stock has one vote in respect to each share of stock held on record for the election of directors and on all matters submitted to a vote of shareholders of the Company.

Special cash dividend declared per share of common stock

$1.25

$3

Special cash dividend declared for common stock

$40,500,000

$96,700,000

Regular quarterly dividend declared per share of common stock

$0.15

$0.15

$0.08

$0.08

$0.06

$0.06

$0.06

Special cash dividend and regular quarterly dividend payment for common stock

6,000,000

0

Dividends paid

14,940,000

45,922,000

96,195,000

Special cash dividends related to expected forfeitures of non-vested Shares

$100,000

$600,000

Installment 1 FY 2013

Class Of Stock [Line Items]

Dividend declaration date

29-May-13

Dividend payable date

24-Jun-13

Installment 2 FY 2013

Class Of Stock [Line Items]

Dividend declaration date

27-Aug-13

Dividend payable date

27-Sep-13

Installment 3 FY 2013

Class Of Stock [Line Items]

Dividend declaration date

4-Dec-13

Dividend payable date

30-Dec-13

2012 Special Dividend

Class Of Stock [Line Items]

Dividend declaration date

5-Oct-12

Dividend payable date

30-Oct-12

Installment 1 FY 2014

Class Of Stock [Line Items]

Dividend declaration date

27-Feb-14

Dividend payable date

27-Mar-14

Installment 2 FY 2014

Class Of Stock [Line Items]

Dividend declaration date

21-May-14

Dividend payable date

26-Jun-14

Installment 3 FY 2014

Class Of Stock [Line Items]

Dividend declaration date

13-Aug-14

Dividend payable date

24-Sep-14

Installment 4 FY 2014

Class Of Stock [Line Items]

Dividend declaration date

10-Nov-14

Dividend payable date

8-Dec-14

Recovered_Sheet2

Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jan. 08, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]
Operating lease expiration		31-Mar-26
Rental expense		$4.30	$5.20	$5.20
Service purchase commitment, description		We have a service agreement with a major telecommunications service provider, where we have committed to purchase a minimum amount of service beginning September 1, 2015 through September 30, 2018.
Value customers seeks in a dispute			6
Loss contingency, credit provided for settlement	$5
Loss contingency, credit provided for settlement, payment period	18 months
Loss contingency, new revenue generating traffic period	2 years

Future_Lease_Payments_of_Opera

Future Lease Payments of Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Operating Leases Future Minimum Payments Due [Abstract]
2015	$4,354
2016	4,236
2017	3,697
2018	3,202
2019	3,098
Thereafter	7,254
Total	$25,841

Credit_Facility_Additional_Inf

Credit Facility - Additional Information (Detail) (Revolving Credit Facility, USD $)	0 Months Ended	12 Months Ended
	Mar. 05, 2013	Dec. 31, 2014
Line Of Credit Facility [Line Items]
Credit facility, initiation date		5-Mar-13
Credit facility, maximum borrowing capacity	$15,000,000
Credit facility, maturity term	3 years
Revolving credit facility outstanding		$0
LIBOR
Line Of Credit Facility [Line Items]
Credit facility, interest rate	3.25%

Income_Loss_Before_Provision_f

Income (Loss) Before Provision for Income Taxes and Related Provision for Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income (loss) before provision for income taxes	$16,523	$15,899	$15,484	$15,320	$16,160	$10,727	$35,093	$15,842	$63,226	$77,822	($32,288)
Current:
Federal, provision for income taxes, current									21,728	15,391	8,864
State, provision for income taxes, current									2,967	428	1,414
Total current									24,695	15,819	10,278
Deferred (prepaid):
Federal, provision for income taxes, deferred									-200	-1,713	-5,817
State, provision for income taxes, deferred									208	-582	1,934
Foreign, provision for income taxes, deferred											-4,437
Total deferred									8	-2,295	-8,320
Total provision for income taxes	$6,417	$6,123	$6,036	$6,127	$5,000	$4,177	$741	$3,606	$24,703	$13,524	$1,958

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax [Line Items]
Estimated effective income tax rate	39.10%	17.40%	-6.10%
Valuation allowance	$23,517,000	$23,444,000
Income tax examination, year under examination	2008
Liabilities for uncertain tax positions	100,000	100,000
ILLINOIS
Income Tax [Line Items]
Valuation allowance	1,900,000
Released valuation allowance related to Illinois EDGE credit	100,000
Italy | Foreign Tax Authority
Income Tax [Line Items]
Valuation allowance	$21,600,000

Effective_Income_Tax_Rate_Reco

Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory federal rate	35.00%	35.00%	35.00%
State income tax, net of federal benefit	3.40%	3.20%	2.10%
Illinois state EDGE credit net of valuation allowance	-0.20%	-1.00%	-4.70%
Impact of sale of global data business	0.70%	-15.50%
Goodwill impairment			-52.50%
Americas Data assets allocation		-4.70%	15.70%
Other	0.20%	0.40%	-1.70%
Effective income tax rate	39.10%	17.40%	-6.10%

Deferred_Tax_Assets_and_Liabil

Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Stock option compensation	$5,232	$9,084
State credit carry forward	2,380	2,577
Capital loss on sale of Tinet stock	21,580	21,405
Accrued other	3,075	2,484
Total deferred tax assets	32,267	35,550
Deferred tax liabilities:
Depreciation	-3,898	-5,091
Prepaids	-732	-800
Total deferred tax liabilities	-4,630	-5,891
Subtotal	27,637	29,659
Valuation allowance	-23,517	-23,444
Net deferred income tax asset	$4,120	$6,215

Reconciliation_of_Beginning_an

Reconciliation of Beginning and Ending Amount of Uncertain Tax Positions (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Balance at January 1	$40	$1,839
Increases related to prior periods	8	10
Increases related to current year	27
Decreases related to sale of the global data business		-1,809
Balance on December 31	$75	$40

Recovered_Sheet3

Stock Options and Non-Vested Shares - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted options outstanding	1,715,000	2,991,000	3,092,000
Non-vested granted shares remaining outstanding	396,000	477,000	846,000
Non-cash compensation expense	$4,300,000	$6,200,000	$13,200,000
Weighted-average exercise price	$13.86	$3.40
Options granted	100,000	700,000
Weighted-average fair value of options granted	$6.90	$1.64	$1.40
Total grant date fair value of options granted	1,100,000	2,400,000	6,100,000
Total intrinsic value of stock options exercised	4,500,000	900,000	4,400,000
Shares, Granted	226,000	332,000
Closing stock price	$19.63
Scenario Adjustment
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted options outstanding	3,500,000
Options exercise price decreased	($1.08)
Non-Vested Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued	100,000
Weighted average remaining term recorded for options, in years	2 years	1 year 8 months 12 days
Shares, Granted	200,000	300,000
Non-vested shares, vesting period, years	4 years
Unrecognized compensation cost	3,300,000	3,900,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-cash compensation expense	1,000,000	3,800,000
Unrecognized compensation cost	900,000	1,700,000
Weighted average remaining term recorded for options, in years	2 years 1 month 6 days	2 years 1 month 6 days
Nonvested Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-cash compensation expense	3,300,000	2,400,000
2003 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of stock options and non-vested shares	4,700,000
Non-cash compensation expense	300,000
2007 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional outstanding shares available for grant	1,600,000
Shares available for grant as a percentage of the Company's outstanding common stock	4.90%
Unrecognized compensation cost	$0

Estimated_Fair_Value_of_Option

Estimated Fair Value of Options (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected life	7 years 2 months 12 days	7 years 3 months 18 days	7 years 2 months 12 days
Risk-free interest rate	2.10%	1.30%
Risk-free interest rate, minimum			1.10%
Risk-free interest rate, maximum			1.60%
Expected dividends	2.10%	0.00%	0.00%
Volatility	60.00%	45.00%
Volatility, minimum			50.50%
Volatility, maximum			55.90%

Stock_Option_Plan_Activity_Det

Stock Option Plan Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares, Options outstanding beginning	2,991	3,092
Shares, Granted	41	716
Shares, Exercised	-1,096	-206
Shares, Cancelled	-221	-611
Shares, Options outstanding ending	1,715	2,991
Shares, Vested or expected to vest	1,704
Shares, Exercisable	1,220
Weighted Average Exercise Price, Options outstanding beginning	$12.91	$14.64
Weighted Average Exercise Price, Granted	$13.86	$3.40
Weighted Average Exercise Price, Exercised	$11.43	$2.02
Weighted Average Exercise Price, Cancelled	$20.08	$7.94
Weighted Average Exercise Price, Options outstanding ending	$12.97	$12.91
Weighted Average Exercise Price, Vested or expected to vest	$13.02
Weighted Average Exercise Price, Exercisable	$16.56
Aggregate Intrinsic Value, Options outstanding ending	$12,580
Aggregate Intrinsic Value, Vested or expected to vest	12,422
Aggregate Intrinsic Value, Exercisable	$4,906
Weighted Average Remaining Term, Options outstanding ending, years	5 years 2 months 23 days
Weighted Average Remaining Term, Vested or expected to vest, years	5 years 2 months 16 days
Weighted Average Remaining Term, Exercisable, years	4 years 18 days

NonVested_Share_Activity_Detai

Non-Vested Share Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares, Non-vested shares outstanding beginning	477	846
Shares, Granted	226	332
Shares, Vested	-307	-442
Shares, Cancelled		-259
Shares, Non-vested shares outstanding ending	396	477
Shares, Non-vested shares vested or expected to vest	370
Weighted Average Grant Date Fair Value, Non-vested shares outstanding beginning	$9.66	$11.31
Weighted Average Grant Date Fair Value, Granted	$13.04	$5.50
Weighted Average Grant Date Fair Value, Vested	$10.59	$11.45
Weighted Average Grant Date Fair Value, Cancelled		$6.79
Weighted Average Grant Date Fair Value, Non-vested shares outstanding ending	$10.87	$9.66
Weighted Average Grant Date Fair Value, Non-vested shares vested or expected to vest	$10.87
Aggregate Intrinsic Value, Non-vested shares outstanding ending	$7,773
Aggregate Intrinsic Value, Non-vested shares vested or expected to vest	$7,263

Recovered_Sheet4

Segment and Geographic Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segment
Segment Reporting [Abstract]
Number of operating segments	1

Revenues_and_Assets_from_Exter

Revenues and Assets from External Customers (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue from external customers	$55,365	$54,045	$54,881	$56,217	$48,528	$50,396	$53,449	$59,288	$220,508	$211,661	$233,003
Long-lived assets	23,678				25,815				23,678	25,815	43,823
UNITED STATES
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue from external customers									220,508	209,310	224,931
Long-lived assets	23,678				25,660				23,678	25,660	43,823
Other countries within Americas reporting unit
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue from external customers										2,351	8,072
Other Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets					$155					$155

Quarterly_Financial_Data_Detai

Quarterly Financial Data (Detail) (USD $)	0 Months Ended	3 Months Ended												12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 30, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenue		$55,365	$54,045	$54,881	$56,217	$48,528		$50,396		$53,449		$59,288		$220,508	$211,661	$233,003
Operating expense:
Network and facilities expense (excluding depreciation and amortization)		23,960	23,016	23,129	24,890	24,151		22,027		24,053		24,636		94,995	94,867	98,758
Operations		7,355	7,432	7,202	7,307	6,107		7,182		7,508		7,798		29,296	28,595	37,481
Sales and marketing		722	1,048	818	676	904		1,090		1,526		2,034		3,264	5,554	8,032
General and administrative		4,141	3,645	5,254	3,800	3,667		6,071		4,535		4,499		16,840	18,772	21,169
Depreciation and amortization		2,681	2,985	3,010	3,141	3,147		3,293		3,699		4,513		11,817	14,652	21,337
(Gain) loss on sale of property and equipment		-31	2	-31		-34		3		223				-60	192	-170
Loss (gain) on sale of Americas Data assets	-28,800				1,081	-5,620				-23,171				1,081	-28,791
Total operating expense		38,828	38,128	39,382	40,895	32,322		39,666		18,373		43,480		157,233	133,841	265,313
Income (loss) from operations		16,537	15,917	15,499	15,322	16,206		10,730		35,076		15,808		63,275	77,820	-32,310
Other expense (income):
Interest (income) expense		14	18	17	2	47		-1		-13		-39		-51	6	21
Other (income) expense				-2		-1		4		-4		5		2	-4	1
Total other (income) expense		14	18	15	2	46		3		-17		-34		-49	2	22
Income before provision for income taxes		16,523	15,899	15,484	15,320	16,160		10,727		35,093		15,842		63,226	77,822	-32,288
Provision for income taxes		6,417	6,123	6,036	6,127	5,000		4,177		741		3,606		24,703	13,524	1,958
Income (loss) from continuing operations						11,160		6,550		34,352		12,236		38,523	64,298	-34,246
(Loss) income from discontinued operations, net of provision for income taxes						3,294	[1]	-68	[1]	-1,698	[1]	-5,336	[1]		-3,808	-43,903
Gain (Loss) on sale of the global data business	-4,800					-5,620		-11		794					-4,837
Net income (loss)		$10,106	$9,776	$9,448	$9,193	$8,834		$6,471		$33,448		$6,900		$38,523	$55,653	($78,149)
Earnings (loss) per share - net income (loss):
Earnings per common share-continuing operations-basic						$0.35		$0.20		$1.05		$0.38		$1.17	$1.99	($1.11)
Earnings per common share-continuing operations-diluted						$0.34		$0.20		$1.05		$0.38		$1.15	$1.97	($1.11)
Loss per common share-discontinued operations-basic						($0.07)	[1]			($0.03)	[1]	($0.17)	[1]		($0.27)	($1.43)
Loss per common share-discontinued operations-diluted						($0.07)	[1]			($0.03)	[1]	($0.16)	[1]		($0.27)	($1.43)
Earnings per common share-net income-basic		$0.30	$0.30	$0.29	$0.28	$0.27	[1]	$0.20	[1]	$1.02	[1]	$0.21	[1]	$1.17	$1.72	($2.54)
Earnings per common share-net income-diluted		$0.30	$0.29	$0.28	$0.28	$0.27	[1]	$0.20	[1]	$1.02	[1]	$0.21	[1]	$1.15	$1.71	($2.54)
Weighted average common shares outstanding		33,316	33,115	32,832	32,273	32,194		32,262		31,629		32,337		32,887,000	32,306,000	30,798,000
Weighted average number of shares outstanding-diluted		33,785	33,343	33,369	32,616	32,501		32,557		31,629		32,453		33,384,000	32,557,000	30,798,000
[1]	Loss from discontinued operations, net of provision for income taxes, for the three months ended June 30, 2013 includes only one month of activity as compared to the three months in all preceding three-month periods.

Valuation_and_Qualifying_Accou

Valuation and Qualifying Account (Detail) (Allowance for Doubtful Accounts, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$900	$423	$1,015
Charged to Earnings	1,925	900	423
Used	-489	-423	-1,015
Ending balance	$2,336	$900	$423