Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 7,798	$ 5,407
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,938	3,725
Bad debt expense	201	189
Loss on early extinguishment of debt	0	134
Equity-based compensation	258	380
Non-cash interest expense	89	288
Other	650	387
Changes in operating assets and liabilities:
Accounts and notes receivable	(1,898)	(1,420)
Advances to affiliates	72	(108)
Other current and noncurrent assets	1,304	659
Other current and noncurrent liabilities	(333)	141
Deferred revenue	416	(675)
Net cash provided by operating activities	12,495	9,107
Cash flows from investing activities:
Purchases of property, equipment and software	(452)	(142)
Capitalization of trademark costs	(25)	(46)
Net cash used in investing activities	(477)	(188)
Cash flows from financing activities:
Payments on debt	(575)	(8,650)
Distributions to non-controlling unitholders	(2,552)	(10)
Payments on capital lease obligations	(54)	(73)
Deferred offering costs	0	(584)
Net cash used in financing activities	(3,181)	(9,317)
Effect of exchange rate changes on cash	(43)	34
Net increase (decrease) in cash and cash equivalents	8,794	(364)
Cash and cash equivalents, beginning of year	88,375	68,501
Cash and cash equivalents, end of period	97,169	68,137
Supplemental disclosures of cash flow information:
Cash paid for interest	2,324	3,210
Cash paid for income taxes	1,097	832
Schedule of non-cash investing and financing activities:
Capital leases for property and equipment	18	73
Distributions payable to non-controlling unitholders	6,100	0
Dividends payable to Class A common stockholders	$ 725	$ 0